Thank you for your warning, seems I didnt do enough research... What companies are currently shipping asics?
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If you're planning on getting into the mining side of things, you should have this thread bookmarked:
https://bitcointalk.org/index.php?board=14.0

Calculating ROI on a mining rig is not linear. Difficulty WILL change, prices may go up or down. It's up to you to figure out the risks associated.