Growl is progressing, we're putting some finishing touches on before releasing .6. Hopefully that'll be done by middle of month, but we've already postponed this enough that I don't want to give out any kind of dates anymore.
We're working on the website, documentation, and finishing up. We had to pull networking from the .6 release because it didn't have the finite control that myself and Karl require. Networking will be in .7. Those already dependent upon networking still use the subversion repository we have setup, which works out fine in itself.
We have to rethink the applications tab of the prefs for .7. It's all bunched together, and if a user installs Growl and doesn't know how it works, they get confused as to why nothing is in the tab.