Listing all Openmeta Tags and associated Files
Some suggestions:
Tags
By CASEapps.

Lists all created tags and files associated with them
Can tag
Easy search filtration
QuickLook



Leap
By Ironic.

Lists all created tags and files associated with them
Can tag
Easy search filtration
Ratings
Heavier/more feature rich interface



TagLists
By Ali Rantakari

Free
Tags &amp; Tag searches for file lists must be made manually

ie. doesn't list created tags, which was what you were after

but hey, the price is right!