Tonight, I spoke with Chris Forsythe, one of the developers of Growl. He said that while the site is back up, the SVN and Trac are still down. However, you are now able to download the latest release of Growl on their site. Forsythe also mentioned that the new Growl website design will go live "soon-ish." On his blog, he has a picture of what the new design will look like.