I'm playing World of Goo, now. It's pretty awesome. I've only beaten the first chapter so far, But I intend to finish it.
Also done a few Hell and Nightmare cow runs, which involved getting my cow-opener through Hell. Not so easy, given that she was made the cow-opener due to being impractical.
Tried out Dr. Mario Online Rx, but it doesn't seem any different from the NES version in any significant respect. Maybe some mode I didn't play is new and worthwhile.
Retired my alchemist in Torchlight. I think I'll make a string of them and see just how powerful a first-level character can be.