There has been an awful lot of chatter around the Web about the hip, cool new thing. As there are multiple ideas involved, with conflicting concepts behind them, I'll just post up a bunch of links to cool stuff here, rather than judging any one of them as the most pelvic.
The DaVinci Machine Project. This will be part of OpenJDK, and it brings oodles of languages into the JVM.
A 50 megabyte Linux install. For your out-of-the-pocket system-owning pleasures.
OODBMS Succeeded. Evidently.
Using Cucumber Acceptance Testing. Cucumber is easy enough for your business people to understand.
Personally, I think the next big thing is arcades, pinball and tying onions to our belts.