The idea is to have a small, cheap and easy to solder development kit for the EFM8UB (Universal Bee) microcontroller.
The board is 0.6x1 inch (you can order 3 of them for $3 from OSH Park). Capacitors, resistors and LED are 0603 footprint (not that hard to solder with a regular soldering iron) and you can get samples for the microcontroller at Silicon Labs website (take the QSOP24 package type).