Justin-Josef Angel has created an RSS feed that contains the complete text of MSDN Wiki community content blocks, rather than just the first 100 characters (as are available in the RSS feeds you can access from the MSDN Wiki home page).  Read about the feed in Justin's post, and then subscribe at http://www.justinangel.net/msdnwiki/MSDNWiki.aspx.

This is pretty nifty--the feed includes the full text of the MSDN content and the community content, and it can take a query string parameter that lets you filter by phrase.

-- MollyBos