D

What does /prog/ think of it? I've been using C++ for the last three years and some of D's features sound cool, so I might consider switching.
What's D's performance in relation to C++?
Does it standard library not suck? (In particular, I'm interested in structures such as strings, vectors, lists, queues, etc.)
Are there good IDEs available?

I'm waiting for version 2.0 to come out. I really like the idea, though, of a modernized replacement for C++. Something that's got the low-level facilities of and compatibility with C, but better integrated with more modern programming concepts (like, for god's fucking sake, modules rather than header files. Jesus.).

There are some criticisms of the standard library, which is why I'm waiting for the next version. I don't know about IDEs; I hear you can configure Code::Blocks to work nicely with it, and of course there's already shit like an Emacs mode. It's hardly surprising that the IDE support is relatively lacking, though, since it's so young.

Give it a few years and I can see this language going places.