Ubuntu 7.04 Alpha 3, Codename Feisty, was released yesterday.
Changes for Ubuntu since Alpha 2
Changes for Kubuntu since Alpha 2
Download Ubuntu 7.04 Alpha 3
Download Kubuntu 7.04 Alpha 3
Download Edubuntu 7.04 Alpha 3
Xubuntu 7.04 Alpha 3 is not released yet.
You can put your feedback here.
If you prefer Debian, I can recommend you Sidux based on Debian/sid. You'll find it at www.sidux.com - the first preview release is out and the first final version is coming soon.