Seattle-based Wetpaint opened its doors today to show off a few sample sites that use its new, super-slick wiki platform.

You can get a good overview of how users interact with wiki’s built on the platform by going through the rather tedious tour. Basically, its a highly user-friendly wysiwyg-type wiki platform. To see an example wiki, check out the xbox 360 site they’ve created.

This is a hosted wiki solution, and Wetpaint’s business model is to add contextual advertising to each page of the wiki.

The company was founded last year and is backed by Trinity Ventures and Frazier Technology Ventures. See Silicon Beat, John Cook and Zoli Erdos for more.