Originally Posted by Jesus H Christ

Five at most, but it's not what you think. The good ole' days of having 40 blogs on one server with different class "c" as you interlink between them are long over. You need to think WPMU and members accounts more then a single blog.

This way you won't get tripped up when google checks BL's of your members blogs. Also, when you BL, make sure to make good use of a proxy with real ISP's. If you go cheep, aol will do for a month or two, but now is the time to buy accounts from Comcast, Verizon, etc. as there are services shared via teamviewer.

Good luck and please kill yourself when done.