Thanks very much, glad you like it. I like the /username idea too so that's on my list of things to update (I'll make sure that everything redirects properly so you won't need to update your links if you don't want to).

I did the back-end as well as the front-end, although I cheated and based the design on a chopped-up Themeforest theme. I love Themeforest for things like this.