Javascript. I mean, learn javascript really well. While I like python much better than js, the prospect of writing the same language for both the server and cli

Javascript. I mean, learn javascript really well. While I like python much better than js, the prospect of writing the same language for both the server and client side is very appealing. Also, things like jquery templates, sproutcore, capuccino, and the node.js ecosystem are just starting. In a couple of years, these will likely be good technologies to be an "expert" in. (just like it paid very handsomely to know how to do iphone development in ~08).