filbiz - 6:59 am on May 20, 2010 (gmt 0)

what is the best way to tell if a site has been affected?

Checking your indexed pages in the search engine like Google is a good start. When my blog was hacked a year ago the hacker injected p-o-r-n links and keywords so all my traffic went down the drain. Check your stats. If there are some weird things happening then I might suspect that it was hacked.