I gave to the Dem Senate Campaign Committee this year...they can spread it around the close races and with a little luck, the Dems will pick-up 6-7 seats in the Senate.
BTW, if you contributed, you should be in the FEC database...
...or if you want to see if any neighbors contributed to a candidate (how much and who did they give it to), its all publicly available:
Advanced Individual Search
search by name, city or zip
So much for privacy!