Is there a dual sim adaptor that actually works well in a Blackberry 7100t? I've seen the ads for "universal" dual sim adaptors, but the idea of cutting two sims down seems a bit daunting, especially when I'm not sure how well it would work in a blackberry.

To my knowledge there is not.

That would be nice however. I really wish the BB had room for 2 sims, one for voice / one for data. Many people, such as myself, would like to use the corporate data and personal voice.

I hear rumors that Cingular is working on "split" accounts, but I think that is a ways off.