Got a little note from Secunia this morning noting that their PSI 1.0 tool has been finalized. (It was a recently Windows Weekly software pick of the week):

Today is a really exciting day, after 17 months of beta testing the
Secunia PSI has reached version 1.0.

During the past 17 months the PSI has become impressively popular and
has been installed on more than 790.000 systems, during this time it has
received acknowledgements like: "quite possibly the most useful and
important free application you can have running on your Windows machine"
and "Not only does this impressive program provide extensive details on
the software installed on your computer, it gives you direct links to
update old and programs that are potentially not secure...We highly
recommend this useful freeware program to keep your software up to
date".

Today, we also launched a forum where users can get help solving various
issues related to patching and securing systems. Secunia staff will help
answering some of the threads / questions in the forum.

You can read more in the attached press release and in our blog:
http://secunia.com/blog/35/

The Secunia PSI is available here:
http://secunia.com/vulnerability_scanning/personal/