Nice site, I like it. Great links, good work.
I think you’ll have more happy users if you’d consider compressing the info: the screen real estate is precious and your “banner” is large. Also you could just list the categories (see GMail Mobile) without bordering them in boxes. Avoid having people use their styli to scroll.

Also, your username text box is limited to 10 characters–any reason for this. Personally it means I have to take extra steps…

Hope this helps.