Actually I think you forgot the Arc32 from your list 
I think the first new one that will show up here is: BotboarduinoJr - This is very much like an Arduino Duemilanove arduino.cc/en/Main/Boards. The main difference is that we added on servo header pins with power bus, plus then we added some LEDS and sound… This board is based on Atmega328 running at 16mhz 1 USART (connected to digital pins 0,1) which is connected to USB. Total 14 digital pins (2 used for USB), plus 6 Analog pins (can also be used digital). Cheap and tons of people use Arduinos.
Not sure what is next between Botboarduino and Propeller:
BotBoarduino: This is based on Arduino Mega (Atmega1280 16mhz, 128K of code, 8K data, 4K EEPROM ) Currently 2 parts, main board and Shield. So far the main board, that we are using is SeeeduinoMega(seeedstudio.com/depot/seeedu … th=132_133). The board runs at 16mhz, 4 USARTS, 70 digital pins, 16 Analog pins… Still need to do a layout with the Lynxmotion hole patterns… I have concentrated on Shield. Again added power bus, plus lots of 3 pin headers, plus LEDS/Switches and speaker.
(20 digital pins, that can be +5v/Servo on 4 pin chunks, PS2 area setup 4 pins, each have power (+5v)/ground), 16 Analog pins (first 2 groups can choose +5 or Vs on 4 pin grouping, upper 8 all are either +5 or VServo)…
Again Arduino’s are very popular. This uses standard Arduino IDE, plus libraries. Note: Both of these boards could probably run at 20mhz (non-standard for Arduino), requires new bootloader (they are out there) and some updates to the libraries (some already have it…)
Propeller based Bot Board: Based on Propeller 1 chip. 8 COGS (been awhile, I will have to brush up once I get an initial prototype board… 
). A quick summary of the board is that most of the digital pins are brought through to 3 pin headers, that again you can choose between VS or 5v. But the propeller runs at 3.3V, so there are level shifter chips installed that do bi-directional conversion on the IO pins. Issue is that these shifters are limited to how much current… Was designed after a board built by Parallax, that I don’t see up there right now. Also as Propeller does not have Analog capabilities, added on AtoD chip. Has setup for PS2, some buttons, LEDS and speaker…
SSC32-NG: I know that Mike was working on a new SSC-32 design with several processors (I think DSPIC for main…)
That is all for now
Kurt
). A quick summary of the board is that most of the digital pins are brought through to 3 pin headers, that again you can choose between VS or 5v. But the propeller runs at 3.3V, so there are level shifter chips installed that do bi-directional conversion on the IO pins. Issue is that these shifters are limited to how much current… Was designed after a board built by Parallax, that I don’t see up there right now. Also as Propeller does not have Analog capabilities, added on AtoD chip. Has setup for PS2, some buttons, LEDS and speaker…