Hi, not the best URL in the world, try to read it loud to someone over the phone.. try to make your logo better, after all it is the anchor for your home page? BTW, is there any added value on other URL shortening sites?
It's simple and straight forward. I think you should have a TOS though. Take a look at the quick little one I made for my Short URL site, you can use it if you want: http://swingk.com/default/i/terms/ But overall it's not bad.
As expected, in case of all url shortening sites there is not much to comment on as far as designing is concern. a logo and header would keep you separate from all other bunch of similar service providers.