I'd get one. Went to Fry's today and got the module for $12
The best advantage this has over the incan is actually the lack of rings that the incan had. My minimag has been sitting around a cup on my desk for a few years now (I bought it at least 6 or 7 years ago). Now I can put it in my car as an emergency light!
Just to say though, if you were buying a new minimag just to put this in, there are options out there that are better for a little more money.
To me, I don't think it's worth $12, but on the other hand, $12 is about how much you spend on a meal at a cheap-middle priced restaurant anyway, and I had a minimag lying around, so for me, it was a good choice.
I was going to take it back since I bought it mostly for experimenting, but seeing as how it takes me 30 minutes to get to Fry's and costs about 4 bucks in gas... I'll be happy with it.
Will try it out in the dark, if it's acceptable then i'm keeping it