Really, really liked this website before the revisions that took place a few months ago. Now appears to be a compilation of not very good looking recipes... honestly hope others find it more appealing than I do.
Lots of useful information on deals, updated throughout the day. Very well maintained and organized.
It's geared towards Chicago area, but covers deals across the blogosphere. Very up to date, lots of content, definitely not for the faint of heart. All frugalistas must check this site out.