I agree that a release would be useful for marketing, but I also think it would help exercise the community and the release process.
I just discovered Solr on Friday and I've been telling people about it, but every e-mail includes "you need to be OK with nightly builds." Being OK with nightly builds means that you need to run your own QA on the whole build every time you change. Kinda expensive. wunder -- Walter Underwood Search Guru, Netflix