wifi speakers needed?

i'm on the hunt for some wifi speakers for our house which will play music from my computer (win7 etc).

- wifi with a reasonably easy to connect USB dongle
- aux in
- and its a bonus if they or it has a built in battery
have looked at the creative t20w and the veho mimi so far with the mimi being closet match.

you know of any others?
will the wifi interfere with my wifi internet?
should play ANY audio coming from my computer, not just itunes for example.


thanks!

The WiFi speakers will play whatever is sent them via the USB transmitter.