It's about half-way through the year, so I thought I might catch up my new "stuff I'm learning" list. Here's the three things that are (or soon will be) taking up most of my learning time:
Git
At the beginning of the year, I wanted to learn about distributed version control. The two choices were git and mercurial. After a bit of research, I decided to give git a try. I've been using git (hosted at github) for 3 or 4 months, but for some book work and for some of my side projects. I still don't have it completely figured out, but I really like it. I want to learn about the svn bridge so that I can do my Seam development locally in git, pushing my work back into the project svn later.
Cocoa Touch
I've been working on an iPhone app in my spare time. While I'm still troubled by how absolutely primitive Objective-C is compared to Java, I really am liking Cocoa Touch. The APIs are still a bit slim, but like desktop Cocoa, it's really well thought out and easy to use. App store here I come!
Amazon WS
I've just barely gotten started here, but I'm fascinated by S3 and EC2. I'm definitely going to play with them over the next few months. As a software guy, I really like the idea of commoditizing server power and bandwidth like this so that I can just focus on getting my app working.