I got some free time so, what big hack would you like
 

if you could have one big modification made for your board, what would it be and what would it do?

An articles hack, take a look at v3articles to see the sort of features.

A Photocast hack, using RSS feeds of photos from flickr, iPhoto, Picasa etc. to populate a forum gallery based on something like https://vborg.vbsupport.ru/showthrea...hlight=gallery

A journal hack that works with php 5 and mysql 4.1.14

Private and Public Events that have their own thread and an RSVP list.

Members can invite others to their Event via a link in the Postbit or Profile dropdown.

Events "area" (forum) shows public events and Private Events that members have been invited to.

Etc.

I'd second the one that Kall mentioned since I could use probably use that.

vb Wiki?

I'd love a hack that sets up e-mail accounts for users when they register, and creates a Webmail UI. Actually, I'd give up the second if I could get the first, there are lots of Webmail programs you could easily plug in.

The thing that I would love nearly as much is for someone to do CommBull right. I never got it to work without intensive manual editing and the developers are not interested in any further improvements. I give them credit for being honest, but I also gotta think that a really first-class product would get something rounding to 100% usage.

Actually -- a real admin-generated update, not just newsletter/subscription routine, should be part of the core.

a hack like sitepoint's marketplace.
where you have to pay to make a post

This hack already exists and i run it myself.

See this Thread: Forums Subscription Manager