Your fingers are going to be crossed for a long time. I think the Steering Committee has too many divergent interests on it for there ever to be agreement on a serious standard library. Schemers are very DIY; for example, see http://philosecurity.org/2009/01/12/interview-with-an-adware.... Rolling your own libraries on top of a tiny implementation is not particularly uncommon. (I just hope you can write more, uh, ethical software than that guy!)

PLT has the most batteries of any distro I've ever seen (disclaimer: one of its authors was my undergrad advisor). That is, PLT is (a) free, (b) mature, and (c) has a fair number of modules written by people other than the developers of the language.

There's no sense in waiting, just dive in. If you don't want to use PLT, Bigloo can call Java libraries---solving your battery problem in a different way.