1. Yes
2. No
I wanted a wii and a PS3, and never wanted a 360. After getting a wii, I decided I don't need a PS3. (Doubt anyone would actually want only a PS3/360 and settle for a wii... that makes no sense as the wii is supply contrained. The other may be possible... or more likely, as for myself, people who were considering multiple decide only on one).