I've added partial support for tag clouds.  The feature is far from complete, but feel free to check out the cloud so far -- and also, add your own tags to your new threads! :)

View the Tag Cloud

It's going to have a little search eventually, but as of now it's not that "complete".   ;)

I do want to have a new release out this week -- so be on the lookout for it!

** Storable Perl module is required, but should be included in a vast number of server installations (like MD5 is).

can we add these to our own forums

When the next version is released, yes.

Fantastic Justin :) :) Are you able to edit or add tags other than when you post a new topic? (would be neat to be able to tag old topics easily - like the rating)

You can edit old posts, but there's no "automatic" way to do it.

Perhaps not 'automatic' but a small box on the message display page; Tag: <text input> Add Button. Just save going in to edit every topic ;)