Year End Bonus/Saving for Down Payment

Hi MB's. I got a year-end bonus and want to save it for a down payment on a house. I will probably be purchasing a house in the next 12-24 months. I know CD's are an option, but is there anything else i could do with the money that will get a better return (that isnt risky).

Stats:
Made around 73,000 net in 2012
Have 30000 in regular savings account
Bonus was 8000

Any ideas? TIA