Congratulations!! That's so awesome!!

I want to second (or third) the hours of operation thing. I can't tell you how many times we've shopped at Performance or REI in place of our two LBS's because they closed at 6 pm during the week (or were closed on Sundays).

I agree with the idea of being well stocked on 'right now' items (like 650 tubes with long stems! ). I also think you should strive to carry clothing that you can't find everywhere else. I don't buy my PI shorts from my LBS because I can get them cheaper online. I would by unusual jerseys or socks if they carried them.

And this is something that I saw at the shop where I had my fitting done (it's no longer there) and I thought it was a GREAT idea. If you are in an area where there is good biking and/or you plan to have rides leave from your shop, this is SO cool. They had a vending machine outside that dispensed things like tubes, gels, sunscreen wipes, electrolyte tabs, chamois buttr, patch kits, bars, socks, etc. Local cyclists LOVED it because they could get emergency supplies even when the shop was closed. This shop also had an outside water spout (potable) and a work stand that was bolted to the porch for general use.