Here's A Nice Embedded System.

Nice.. only need flash drive and you are good to go..

What's the spec like? I had a quick look but am on my TV and have tired eyes so couldn't read a word on the website.

The smaller the board usually means lower spec (not always though). but anything over arun 1Ghz dual core and 1Gb ram should be fine for an EZ-Robot.

Here's a 6 min vid of a tour of this board and an expansion board that comes with it. The main board fits the specs RichMR2 suggests and the expansion also sports a motor controller. Don't know the specs on the motor controller but it should run smaller DC and stepper motors. It doesn't appear to have Bluetooth but a USB Dongle or one soldered to the expansion board would do the trick. Looks like the whole kit is just under $200 USD.