I just got mine a few days ago, a 1.42GHz with 512 MB of RAM, the usual 32 MB of VRAM. Since I am using this to more or less replace my old TiBook, I would like to eventually bring the mini to 64MB of VRAM also. I use them for some gaming and VJ work which really benefits from the 64 MB. I know, it won't be easy, and maybe not possible. But minis are cheap enough that I am willing to experiment. Besides, the last-gen minis with the 64 MB stock were "stealth upgrades" that most buyers aren't even aware of, and eBay is a clusterfrack of people who don't know what they are trying to sell. So, I think I might have a shot of sooner kludging something together.
As for my Mini - I don't know, I haven't been able to pry it open yet! But I am late to the party, so I wouldn't be surprised if others here perhaps already made note of theirs.