similar development boards to the "Parallax Professional Development Board"

I've seen a few dev boards with integrated breadboards for the AVR, but
not many. One is available from Futurlec.com, but I'll warn you I've had
trouble with this company accepting my order and charging my card even
through they were weeks backordered on product. Tread carefully. OTOH,
the prices are very good.

Otherwise, you can always use something like the STK500 and run the
headers out to the breadboard. I like the (somewhat overdone) AVR board
from mikroElectronika. The most common hardware (LEDs, buttons, LCDs,
even an SD card) are already attached. You can make your own 2x5-to-10
pin cables so attach ports to a separate breadboard. Can't say I
recommend their compilers yet, though. They are too new and I found the
Basic compiler for the AVR not at all optimized, and some libraries
didn't work. You can use most anyone's compiler with the board. I bought
mine from Circuit-Ed, which is based in the US -- excellent customer
service.

-- Gordon

Have a look at the breadboard at:
http://www.dontronics-shop.com/product.php?productid 374
this is a bare board, but the price halved today, so it may suit you.

to drive it, a DT006 also at half price:
http://www.dontronics-shop.com/product.php?productid 328

Or as Gordon suggests, you can drive it from an STK500 if this suits
your needs.

Don...



--
Don McKenzie
E-Mail Contact Page:               http://www.dontronics.com/e-mail.html

Micro,TTL,USB to 1.5" color LCD http://www.dontronics.com/micro-lcd.html
USB,RS232 or TTL to VGA Monitor http://www.dontronics.com/micro-vga.html
World's smallest USB 2 TTL Conv http://www.dontronics.com/micro-usb.html