diff -Nru testdrive-1.36/debian/changelog testdrive-1.37/debian/changelog
--- testdrive-1.36/debian/changelog	2010-04-26 20:53:33.000000000 -0500
+++ testdrive-1.37/debian/changelog	2010-04-26 20:53:33.000000000 -0500
@@ -1,3 +1,15 @@
+testdrive (1.37-0ubuntu1) lucid; urgency=low
+
+  [ Andres Rodriguez ]
+  * debian/control, testdrive, testdriverc: update the testdrive cache
+    at most once per week on launch, dynamically determine Ubuntu
+    development release and cache it, LP: #570485, #553616
+
+  [ Dustin Kirkland ]
+  * debian/control: recommend usb-creator for gtk or kde
+
+ -- Dustin Kirkland <kirkland@ubuntu.com>  Mon, 26 Apr 2010 20:27:54 -0500
+
 testdrive (1.36-0ubuntu1) lucid; urgency=low
 
   [ Vish <drkvi-a@yahoo.com> ]
diff -Nru testdrive-1.36/debian/control testdrive-1.37/debian/control
--- testdrive-1.36/debian/control	2010-04-26 20:53:33.000000000 -0500
+++ testdrive-1.37/debian/control	2010-04-26 20:53:33.000000000 -0500
@@ -14,8 +14,9 @@
  python,
  qemu-kvm | kvm ( >= 1:84+dfsg-0ubuntu12.4 ) | virtualbox-ose ( >= 3.0.8) | virtualbox-3.0 | virtualbox-3.1,
  rsync,
- wget
-Recommends: zsync, usb-creator-gtk, cpu-checker, kvm-pxe
+ wget,
+ python-launchpadlib
+Recommends: zsync, usb-creator-gtk | usb-creator-kde, cpu-checker, kvm-pxe
 Description: run the daily Ubuntu ISO in a virtual machine
  Testdrive helps you download and run the daily Ubuntu development ISO
  in a virtual machine on your local hardware.
diff -Nru testdrive-1.36/testdrive testdrive-1.37/testdrive
--- testdrive-1.36/testdrive	2010-04-04 19:12:59.000000000 -0500
+++ testdrive-1.37/testdrive	2010-04-26 18:41:13.000000000 -0500
@@ -21,6 +21,7 @@
 import commands, hashlib, os, string, sys, tempfile, time
 #import optparse
 from optparse import OptionParser
+from launchpadlib.launchpad import Launchpad
 
 PKG = "testdrive"
 PKGRC = "%src" % PKG
@@ -40,6 +41,8 @@
 KVM_ARGS = os.getenv("KVM_ARGS", "")
 VBOX_NAME = os.getenv("VBOX_NAME", "")
 hasOptions = False
+update_cache = None
+codename = None
 
 def select_iso():
 	global ISO, CACHE_ISO
@@ -146,6 +149,44 @@
     kvm-ok\n\
     sudo apt-get install virtualbox-ose")
 
+def lp_obtain_release_codename():
+	launchpad = Launchpad.login_anonymously('testdrive', 'production', CACHE)
+	return launchpad.distributions['ubuntu'].current_series.name
+
+def is_codename_cached():
+	if not os.path.exists(CACHE):
+		os.makedirs(CACHE, 0700)
+	if not os.path.exists("%s/current" % CACHE):
+		return False
+	return True
+
+def is_cache_expired():
+	cache_time = time.localtime(os.path.getmtime("%s/current" % CACHE))
+	local_time = time.localtime()
+	time_difference = time.mktime(local_time) - time.mktime(cache_time)
+	# Check for new release at most once-per-week (60*60*24*7 = 604800)
+	if time_difference >= 604800:
+		return True
+
+	return False
+
+def update_ubuntu_codename_cache(str):
+	try:
+		f = open("%s/current" % CACHE,'w')
+		f.write(str)
+		f.close
+	except IOError:
+		pass
+
+def get_ubuntu_codename():
+	try:
+		f = open("%s/current" % CACHE,'r')
+		codename = f.read()
+		f.close
+	except IOError:
+		pass
+	return codename
+
 ########
 # Main #
 ########
@@ -187,6 +228,39 @@
 	get_virt()
 	sys.exit(0)
 
+if CACHE is None:
+	CACHE = "%s/.cache/%s" % (HOME, PKG)
+
+## Obtain Ubuntu Devel Release Codename ##
+#Verify if the codename is cached, if not, set variable to update/create it
+if is_codename_cached() is False:
+	update_cache = 1
+# If codename cached, verify if it is expired. If it is, set variable to update it.
+elif is_cache_expired() is True:
+	update_cache = 1
+
+# If variable set to update, obtain release from launchpad
+if update_cache == 1:
+	info("Obtaining Ubuntu Development Release codename from Launchpad...")
+	try:
+		codename = lp_obtain_release_codename()
+	except:
+		print "ERROR: Could not obtain the Ubuntu Development Release codename from Launchpad...\n"
+
+# If release was obtained, update the cache file
+if codename:
+	try:
+		update_ubuntu_codename_cache(codename)
+	except:
+		error("Unable to update Ubuntu Development Release codename cache.")
+
+# Try to retrieve Ubuntu Devel codename from cache
+info("Retrieving Ubuntu Development Release codename from cache...")
+try:
+	r = get_ubuntu_codename()
+except:
+	error("Unable to retrieve Ubuntu Development Release codename from cache...")
+
 # prime configuration with defaults
 
 config_files = ["/etc/%s" % PKGRC, "%s/.%s" % (HOME, PKGRC), "%s/.config/%s/%s" % (HOME, PKG, PKGRC) ]
@@ -223,8 +297,8 @@
 
 # Set defaults where undefined
 
-if CACHE is None:
-	CACHE = "%s/.cache/%s" % (HOME, PKG)
+#if CACHE is None:
+#	CACHE = "%s/.cache/%s" % (HOME, PKG)
 
 if CACHE_IMG is None:
 	CACHE_IMG = '%s/img' % CACHE
diff -Nru testdrive-1.36/testdriverc testdrive-1.37/testdriverc
--- testdrive-1.36/testdriverc	2010-04-04 19:12:59.000000000 -0500
+++ testdrive-1.37/testdriverc	2010-04-26 18:34:32.000000000 -0500
@@ -57,7 +57,9 @@
 # using rsync.
 # You can mangle or add to this list here (but you will get conffile conflicts on this
 # file at some point in the future upon upgrade.
-r = "lucid"
+# Uncomment the following line if you want to hardcode the Ubuntu release; otherwise,
+# TestDrive will try to determine it dynamically.
+#r = "lucid"
 m = ["i386"]
 u = "rsync://cdimage.ubuntu.com/cdimage"
 import platform