It turns out that after being busted by the Security and Exchange Commission his initial work at MyDD was anything but reality-based. Dan Reihl and RedState document Mark Warner and Sherod Brown's top Internet advisor's history in astrology.
In the hours since the story broke it looks like a search and replace has been done at MyDD for the term 'astrologer ' See this post (Original / Sanitized) for and example of the purge - look for the second comment by 'Hugh' in the original post. Suddenly it's not there anymore in the latest version of the 2004 post, which Google cached in February 2005.
The Warner and Brown campaigns are in a bind. Dropping Armstrong is the logical course of action, but it they do they risk losing the support of Kos, whose support seems to correlate pretty strongly to Armstrong's employment.
Update: The New Republic's Lieberman-loving neocon owner has a few well written words for Kos and the kiddies...