Hi everyone,
After hours of work (and equally many hours adding lenses into the database), I've finally finished the new
user lens reviewing system 
It is intended to provide users with facts as well as others' opinions about every Pentax lens ever produced. Please have a look here:
http://www.pentaxforums.com/lensreviews/index.php
When viewing any lens, click "post a review" on the main info table to post any comments as well as:
- Price
- Rating (out of 10)
- Recommendation (yes/no)
As you can see, not all screwmount or 67 lenses are listed yet- I'll be adding these tomorrow. I'll also take care of linking to the new section from the forum, as well as vBSEO integration and other minor backend tweaks.
Thanks for looking, and I hope to see this grow into a highly useful resource. Enjoy!
P.S. I'm still looking for photos of most of the lenses. If you own a lens and would like to "donate" a photo, please PM me.
Note that the database only includes lenses with "Pentax" or "Takumar" in their names.