That's interesting, considering an Intel Chipset doesn't even have the required technology to run the game. I can't imagine how slow the game will run out in the Wasteland and in the DC area.
I highly doubt its too playable or stable when in the game, since it doesnt support the correct shader models.
Actually, I've been playing it for two and a half hours now and it's been running great. The frame rate dropped a little bit in Moriarty's Saloon for a little while, but then it went back to normal. There are definitely no problems when running around outside, it's only interiors that I have problems in (and actually, that happened to me a bit with Oblivion too). When I was looking into a solution for the problem before, I found that a few people who had got it to run on a chipset had problems with occasional crashing, but I haven't had anything of the sort. It's even been okay with alt+tabbing in and out, which sometimes can crash other games I've run on here, although not always.
If I was further in my Computer Science degree right now, maybe I'd be able to come up with an explanation as to why exactly it does work, when so many people say it shouldn't, but as it stands I just don't know enough about it. All I can tell you is that it is working and I, for one, couldn't be happier about it!
It may also be worth mentioning that I'm running Vista Home Premium with 4gb RAM, DirectX 10 and an 2.0GHz Intel Pentium Dual CPU processor. So it is a pretty decent computer, got it for Christmas a year ago. I guess for whatever reason, the chip I have is good enough to run the game.
[Update]Just found http://www.intel.com/support/graphics/sb/cs-014257.htm which seems to imply that my chip (the first on the list) does in fact support shaders, along with many others. Now I don't really know much about it but it seems to me as though people have been generalizing saying that chipsets don't support shaders when in fact some of them do; some through the hardware others through software. Therefore I can conclude that before buying the game, you want to look up your chip on the Intel website and find out what exactly it does and does not support. What this means is that my solution will work for certain people, but not everyone. I'm not entirely sure if a chipset relying on software for shader support will work in the same way or not.[/Update]
Anyway, I'll update this thread if I come across any other problems.