I bought a cordless dremel that runs at a lower speed than my regular one, and MUCH prefer it when it goes to dremelling nails. Mine doesn't use regular batteries, it has a battery that you need to charge up, much like any other cordless power tools. I think it's called the MiniMite or something like that... it's quieter because it spins at a lower speed, so it's more of a low hum.
And also, because I'm a huge klutz - if I knick myself while I'm using it, it does very little damage to me. =P
I know some people use the "stylus" dremel, but I got a really good deal on the MiniMite so I bought that one instead. I'm not sure what speed it runs at compared to the stylus dremel...