From the UESP (Utah Educational Savings Plan) newsletter I got, there is an exerpt:

"One reason UESP continues to hold the national media spotlight is our relatively low fees.  UESP's asset fees range from 0.0% to 0.391%.  UESP also charges an annual account maintenance fee of up to $25 per account per year.  This fee is waived for Utah residents.  UESP does not charge asset or maintenance fees for the quarter in which an account is opened.  UESP charges no fees at all for one investment option, the Public Treasurer's Investment Fund.  A $30 fee is charged to affected accounts for bounced checks or rejected automated clearinghouse (ACH) transactions.

Unlike some other 529 plans, UESP does not charge "specialty fees."  There is:

• No enrollment fee
• No front load
• No back-end load
• No minimum balance fee
• No disbursement fee
• No transfer fee
• No investment option change fee
• No account closure fee

Now you are probably wondering where to start with, which state has better plans, etc.  There are many sites have such information, but I found this two are helpful:

http://www.bankrate.com/brm/saving4college/brm_sfcsearch.asp

http://www.savingforcollege.com/intro_to_529s/ (other information are in that page, just keep clicking)