One video port and one USB is all you get as far as ports for now, with both ethernet and Wifi planned. Power usage? 1W at full load. I have attached a video about it below. Update: They will also have a Model B with 256 megs of RAM and a 10/100 Ethernet port, price point: $35.
Update: Raspberry PI will be at the NYC Maker Faire. Looking forward to seeing what they have planned for the unit. Eben Upton, one of the founders will be there to explain the plans for the project.
Update 2: On Availability: From the Raspberry PI website
When will the device be available to purchase?We anticipate the device will be available to the general public later in 2011 – we were hoping to hit the end of November, but right now December’s looking more likely.