[aspiringsensei]

I'm partial to treasurydirect's t-bills program. No fees (except if you sell early) and short maturity.

[_delirium]

If you're under the FDIC insurance limit, I've generally found savings accounts to pay more for the same safety. For example, ING Direct currently pays 1.10%, versus 0.15% for the 1-mo and 3-mo t-bills.