You can find aftermarket Phottix LP-E6s in eBay for $40 with free shipping for two units and a charger. Apparently, the Canon charger will not charge non-Canon batteries without the chip. I have 4 Phottix BP-511As for my 40D and they've been solid but I'm not sure if I want a non-Canon battery on my 7D as it will not show power information and I kinda like the new battery info / tracking system on the LP-E6s. Canon ones sell for $70 a pop which isn't too bad compared to when the 5D2 was just released.
I bought one with the charger for $14 delivered. I'm only going to use it for emergencies (and when I first get the 7D while the Canon battery is charging). Sooner or later someone will figure out how to get around the chip just as they did with the Nikon EN-EL3e.