I've read a number of people have done it with a mini 9, but apparently the 10 comes with a different graphics chip.

According to my dell mini 10, the graphics is a GMA 950, which from what I can tell is the same as the mini 9?

The mini is just over a year old, just to give you an indication of what might be inside.

I've only got 1gb of ram and 16gb SD inside, if OS X will install on it ok, will it be usable? I've got windows XP on there at the minute and have it it since purchase, and I don't really want performance to suffer if possible.