I just took the drastic step of turning off the "autorenew" setting on my .Mac account.
The last 2 reasons I had for keeping it were iSync, and my Dad's email account. He just emailed everyone saying he's going to be using the account from his ISP, so that leaves iSync. Can't justify the cost to keep my Safari bookmarks synced between 2 machines.
Why isn't iSync capable of working without a mediating server? It'd be cool if I could set up one machine as "master" and the others would sync to/through it. But, that could cut into .Mac subscriptions...