I was able to get a list of the games in an email from Mediacom that they plan to blackout this year. I noticed Comcast blackout the Brewer series too, so maybe this is their list too. I haven't noticed if it has been posted before, so feel free to delete if it has.
Wednesday April 16, 2008 Milwaukee 7:15pm FSN
Thursday April 17, 2008 Milwaukee 12:15pm FSN
Tuesday May 13, 2008 Pittsburgh 7:15pm FSN
Wednesday May 14, 2008 Pittsburgh 7:15pm FSN
Tuesday May 27, 2008 Houston 7:15pm FSN
Wednesday May 28, 2008 Houston 7:15pm FSN
Thursday May 29, 2008 Houston 7:15pm FSN
Tuesday June 17, 2008 Kansas City 7:15pm FSN
Wednesday June 18, 2008 Kansas City 7:15pm FSN
Thursday June 19, 2008 Kansas City 7:15pm FSN
Tuesday June 24, 2008 Detroit 6:05pm FSN
Wednesday June 25, 2008 Detroit 6:05pm FSN
Thursday June 26, 2008 Detroit 12:05pm FSN
Tuesday July 1, 2008 NY Mets 7:15pm FSN
Wednesday July 2, 2008 NY Mets 7:15pm FSN
Thursday July 3, 2008 NY Mets 7:15pm FSN
Tuesday August 5, 2008 LA Dodgers 7:15pm FSN
Wednesday August 6, 2008 LA Dodgers 7:15pm FSN
Monday September 22, 2008 Arizona 7:15pm FSN