![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
Somebody already had the idea to just run an order through as Bank Transfer, and mark on the order that they will pay with bitcoins. I totally support this if you want to stake a claim to your spot. For these orders, my sales team will just contact you directly for payment...its good incentive for me to get the BitPay gateway working.
Please don't abuse it - place an order for the number of units you intend to pay for. Keep in mind that I can't spot the BTC price at the exact time you placed the order - but I will set BTC at Daily (High+Low)/2 on the day you purchased, according to http://bitcoincharts.com/charts.