@axle: Well, you've almost entirely missed the Crimbo event this year - which has resulted in a pretty good haul for my Display Case, plus a new familiar that I may or may not use - but there are a fair few new changes to gameplay. Valhalla has had a revamp, and there are new special challenge paths, implemented as of May 17th. Three are currently available: Bees Hate You, Way of the Surprising Fist and Trendy, the current one. If you had to pick one, I would choose Way of the Fist myself, even though it was replaced by Trendy recently. Excellent combat skills available, but you can't wield a weapon and your Meat earnings are pitiful.
To sum up: If you feel like it. I still play. ^_^