The Olimex is very nice (512 MB, A13 processor,gpio), but
- the size is 2,5 x times a RPi (120x120mm)
- doesn't have a ethernet interface by default
Yes I know, it has an option for wireless...... still that is an option...
And yes, you can use the UEXT to get a ethernet adapterboard connected, but again that is extra.
So not having a standard ethernet (wired or wireless) is for me a no no.
Perhaps their A10 version will be better, hope they make one without a vga and as small as possible.
I rather have a carambola: http://www.8devices.com/product/3/carambola
which has standard wifi and 2x ethernet