The sourcexchange.org domain was no more so in the good ol' Internet tradition I snatched it to save the world from seeing another porn site here. Here is the 2001 announcement on closing the original SourceXchange project.

opensourcexperts.com is a new site with a similar (and perhaps more ambitious) goal than SourceXchange. It has been created to serve as a free directory of Open Source Solution Providers and for facilitating payment for developing or supporting Open Source software for interested companies or other entities.