In reply to therestofjj:
Troll or suicide candidate?
Better just go skiing at Paradise, have a look at the route, then think again.
By most realistic routes, Rainier in winter is almost completely a ski trip, not a climb (all climbing routes would involve loads of skiing for approach and descent as well).
Crevasses will therefore be less of an issue than avalanches and cold/exposure. For the latter, March or April are a much better idea than January.
Otherwise, Rainier is not technically hard, if the weather window is good (despite rumours to the contrary, you can have such windows in the PNW) and you are fit, acclimatized, and an experienced ski alpinist.
Definitely not a good solo objective, though.
CB