Small, lightweight embedded HW to run Linux

Would you recommend any particular embedded HW with the following specs and able to run Linux?

( o ) - 5 x RS232 ports (upto 115200 bits/sec) ( o ) - 1 x 10/100 MBits/sec ethernet ( o ) - 2 x 8 bits general purpose digital I/O lines (TTL) ( o ) - Able to booth from either Support ComaptFlash memory unit or USB memory stick

( o ) - Weight less than 100grams ( o ) - Size smaller than 10 cm x 10 cm ( o ) - ADC inputs (Optional) ( o ) - Low-cost (Desirable :)

Thanks for your guidance

Gregembe