You've got to be kidding me!! http://www.metawatch.org/
It's all TI hardware (MSP430 MCU and CC2560 Bluetooth) - http://processors.wiki.ti.com/index.php/MetaWatch
Moreover, it's Embedded and Open Source developer's heaven - APIs and protocols are open, firmware upgradable and debuggable with JTAG, most of the source code is provided and hosted on github...
I'm very tempted, but trying to figure out which next toy I can skip buying to buy this for $200 instead... :)