ember - 3:22 am on Mar 25, 2011 (gmt 0)
Got the email Monday that our site had violated Adword's policy, even though we've been using the same site since 2004 or whenever Adwords started. No explanation, just a link to a page with possible reasons. I "fixed" everything I could think of and requested a review, per the email instructions. Got a second email today saying the site was still suspended but at least this time I got a specific reason. Fixed that but am afraid to ask for another review and so am waiting to see if Adwords restarts on its own. I am noticing that a lot of our competitors have disappeared, so I think Google is doing a sweep.
Bing is looking better and better (and cheaper).