I don't know about "anywhere" but there has been activity here and on Facebook, which are the only official sites LDW uses to communicate with us.

LadyCFII talked about the VF3 beta several times in the News and Announcements "What's new with VF3?" topic and the Developer Feedback forum. She made sure we all knew how to sign up for the beta and what to expect. On the Virtual Families Facebook page they announced the beta back in May, and they posted several times to let us know when new slots open up.

I also know that beta tests are very busy times for any developer, and they probably don't have a lot of spare time to chat with us.