Why Wiki
Part of vbz's mission (largely unwritten at this point; planning to remedy that via this wiki) is to use new information technology to provide better service, and hopefully improve business practices in general. This wiki is an experimental foray in that direction. I don't know of any other online stores which provide such a service; if anyone knows of such a thing, I'd be very interested in hearing more.
Any store, even online, is part of a community: there are people who run the store, people who make or supply the items sold, and of course the people who buy those items, or who might be interested in buying them. Most of what we sell is of an artistic nature, so there are also the artists who create the designs, and the people who appreciate the artists' work, and the artists' agents... and in many cases, you have musical artists whose work helped to inspire the visual works, and their associated communities (often quite large).
Eventually, I may add a BBS or other interactive content-management stuff to vbz's infosphere; for now, though, the wiki was easy to set up, and is tremendously flexible.
I do, however, want to avoid this.