We (http://www.jaihodesi.com) recently added few external feeds and noticed in the Google Webmaster Central that it has lowered our indexed URLs significantly. Please let me know
a) Why Google penalising and the logic behind this?
b) What alternatives you suggest to overcome this? Also your recommendations of posting aggregated info from several sources from internet onto to the site? Any free tools (hacks?) available that we can use to post directly this info on to our VB site?