Electronics Controller Comparison Spreadsheet

Here is a google doc trying to compare the controllers out there for RepRap.

RepRap Controller Comparison

Anyone can edit it, I made a copy in case it gets destroyed.

I couldn't find a quick comparison chart for the various attributes and started putting this together today. There are still items missing and perhaps someone more knowledgeable could change a few things. I would certainly appreciate any feedback as I decide on my first controller purchase.

Thanks!