Lpc2000

Indeed,

there are a lot of these boards out there, either poststamp size or 
DIP32/40 size.
I use these: http://www.embeddedartists.com/products/boards/ fairly 
cheap (35 - 45 EUR range) and each of their boards is almost delivered 
as a complete development kit containing a quickstart manual and a CD 
with software - this really got me up&running within 1 hour after 
unpacking the box - the biggest problem was finding a 5V powersupply 
with the correct cable :-)
Specially I like the RS232 connector on the boards, now I can just 
concentrate on my IO without bothering how to connect it to my 
(development) PC.
The lpc213x and 214x boards can even be powered by USB but if you cut up 
an unused USB cable any breadboard will be able to power from USB ;-)

Rob

Earl Bollinger wrote:

> www.newmicros.com has the nifty little Tini2106, Tini2136  and 
> Tini2138 Arm(tm) units with a Phillips ARM MCU on a 24 pin .100" board 
> which is about 1" square in size. Very easy to plug into a breadboard. 
> it also has LED's built in and it's own voltage regulators, so it is 
> easy to inferface to. Hooking up a JTAG programmer is easy too.
> Only $29.00 each, cheaper by the dozen.
> If you need more I/O they have the small Plug-a-Arm boards too.