I have started my work on my second robot - Wi-Rover. the idea as i said while concluding my first robot is to have one that can roam around on itself avoiding obstacles and can be controlled using my latptop over some wireless mechanism. Since adding the arm board on my robot and adding the wireless LAN capabilities turned out to be a very costly option, i am designing my robot around long range RF Modem's. It has an initial investment but they are re-usable and really nice. You can find the full description here - http://www.sparkfun.com/commerce/product_info.php?products_id=560
Here are a couple of initial photos of the Wi-Rover the chasis and the rest of the stuff is pretty much taken from my first robot Rover (http://letsmakerobots.com/node/1736). And the looks inspired from "Wall-E". I have ordered the parts and am anxiously waiting for them to start further work on this.