1. 4 hours depending on workload(sort of an air form factor with a core-i7).
2. Yes, all supported, and still using my apple magic mouse. Used Skype, Vidyo, and Google Hangouts.
3. Can't say for sure, no reboots so far, wakes just fine.
4. Using an external monitor at work with my apple display port -> dvi adapter, so pretty much worked no problem. I was worried about the display being lower res than an air, but it hasn't been a real issue.
5. Yes, work fine.
6. The trackpad is ok. functional, but more temperamental than the mac pro.
7. I like the keyboard better, but I've never liked the mac keyboards.