The latest stable release for UISP is 20050207 and is available from the download area:
http://savannah.nongnu.org/download/uisp/uisp-20050207.tar.gz
This release includes three new wirings for programming: DASA3, ATDH and DM04. It also adds support for AtMega88 and AtMega48, and it's compatible with g++-3.4
The latest stable release of uisp is 20030618 and is now available in the download area.