Hey guys I have been Puttering along at 27 MHash/s on my laptop playing with bitcoin as a hobby. but I am looking to put together a real mining rig here in less than a month. In doing research, and trying to wrap my head around several "what if" scenarios, I made this spreadsheet to do all the calculations and whatnot. I was wondering if there was anything I missed, or left off of it. And hopefully it will be usefull to other people as well.http://www.woodrell.com/joe/bitcoin/mining_sheet.zip
Yellow boxes are "input data" that affect the calculations.
Let me know if you have any questions, or if you find it excessively useful