Hooray! I think you'll enjoy it, the number of books on the Kindle store still has a way to go, but it's getting there. I'd say 75% of the books I wanted to buy had digital versions available and the ones that were missing were older Asimov/Arthur C. Clarke sci-fi and stuff like that.
However, please pass the link on to people you think would be interested! I'm counting on SLU to make me famous.