Foomatic 0.6.3 is now available at both Savannah and here; it has also been uploaded to Debian unstable.
The main new feature in this release is the display of information from the LinuxPrinting.org printer database when in the printer make/model browser, using a GtkHTML2 widget. A screenshot of the new functionality is here.
Here's an updated screenshot of the current, more OS X-like main interface: