So after buying my first Arduino, I picked up a couple of Modern Device's BBB's to put into projects. And then I discovered my first Arduino love, the dorkboard (http://dorkbotpdx.org/wiki/dorkboard
Designed by dorkbotpdx'er Don Davis, the Dorkboard is small, cheap (found locally for about $6 + cpu or for $10 from Wulfden) and works well with a breadboard. I bought six over a period of time, and was very happy.
The only problem I had with the Dorkboard is the non-standard TTL-serial interface (5pins vs. the normal 6). This was ok for a time, but when I have 3 TTL Serial/USB adapters just sitting around I couldn't use (vs. a single clumsy adapter board), it became a pain.
So I decided to create my own Dorkboard "clone", which was essentially added a FTDI connector (and I adapted the parts to suit what I had). My board is slightly larger but does have labels for each of the pins. I did a "Rev B" and slightly moved the FTDI connector away from the 28pin socket (so I could use a vertical header if I wanted). Oh yeah, I moved the design credit to the back of the board so it could be seen when the board is assembled.
The attached pic shows my first run prototypes flanked by a headless Dorkboard.