Teck I might be interested in your services if, now you have the code and methods written, they may be quite a lot cheaper than $7,000. How 'pluginable' are they? By which I mean would upgrading vBulletin undo your changes, or do you apply them as plugins?
And what happens when a new version of vB is installed?
Take a look at my site
www.avforums.com which has usually suffered from some kind of performance problems on a regular basis.