Picked up an almost new, barely used Sigma APO 70-200mm f/2.8 EX DG HSM lens along with a UV and a polarizing filter for it for a pretty good price late last week. It's no Canon EF 70mm-200mm f/2.8L IS USM but it can hold its own quite well. Definitely needs at least a monopod or tripod at 200mm though if you want to get the best results. This particular copy seems to be a bit softer wide open at 70mm but I can live with that.
Walked over to the local park in the late afternoon to take some test shots...