Hi,
ARM9 based OMAP-l138 processor is good for purpose you have mentioned. Hawkboard, open hardware platform was good for same purpose, but now its going through some hardware issues .
Infact we are also in process of building such kind of SBC, which will stream videos, run word processing application , java applets etc..
processors proposed are AM3703 , AM3715 ,OMAP 3503, AM3505, AM3517.
Also I am searching for any open hardware design which I can take as reference for my project .
Please give your inputs for above.
Thanks,
Abhishek.