Seriously impressive in 8 months and I'm sure a lot of recent arrivals, just like myself, wish we'd been around at that time to invest.
Don't kid yourself, I thought AM was shooting too high and wouldn't deliver, I invested in a more conservative mining operation, only to have them pull the plug after 4 weeks (most likely a ponzi), and I haven't seen a BTC penny back. Investing in AM is more a stroke of faith and luck given the BTC investment history.
There are opportunities to but a USB miner
https://bitcointalk.org/index.php?topic=99497.0