Holy flurking schnidt, it's back with all the comics working again!
From developer website:
"Version 1.6 (April 2010) - ALL comics are back, lots of NEW characters included, MORE than 150 strips supported!
Dilbert, Calvin & Hobbes, Garfield, B.C., Momma and dozens more are again available in freeComics, thanks to a huge redesign of the widget. The list of comics has been updated to include all the latest release: moreover, several all-time classics are now in full color."
Of course, comics will probably gradually stop working again as websites change URLs or otherwise get hostile to its webscraping, but hey, I'll take what I can get ;-)