Thats odd.. most of popcap's games are at yahoo anyways.
Yahoo games/personals/etc. are definitely blocked as well... Heck, I'm the one who usually adds "bad" sites to the proxy server's black list. (Personally I don't care what people are surfing while at work; that's for their supervisor to worry about. But when somebody gets caught doing something they shouldn't have been doing, or I have to spend an hour or so cleaning up spyware/viruses...well, sites start getting blocked...)