As a couple posters said, they've been out for a short time already. Right now, they only come in the quad core flavor (more geared towards desktop replacements and mobile workstations), and you're not going to see the mainstream dual core variant until Intel rolls out more of their 32nm refresh. They're expected within the end of this year and mainstream availability will probably be early next year.
If you're going to be gaming, you're way, way better off getting a laptop with a beefy video card, and you may be hard-pressed to get both that and a mobile i7 on your budget. If mobility is not important to you, you could build a desktop computer that would mop the floor with (and steal the lunch money from) any laptop you could buy for the same price. You could even do this and have enough money left over for a netbook for everything else.
There aren't enough games out there that take advantage of quad core processors to justify the weight it has in your decision. Mobile i7 may not have a huge advantage over its Core2 counterpart when it comes to gaming, but it completely spanks it in other areas which are likely not important to you.
Also, let me introduce you to my Asus w90vp-X2. Runs great with its dual Intel X25-M SSDs in Raid0. I think you two would get along! Great for stuff like Fallout3 or Crysis while on the road.