FHA loans are nice when there are no other options, but in today's mortgage market boom you might be eligible for a mortgage + home equity loan such that you will not have to pay the PMI/MIP that is required with FHA loans and get a better rate than an FHA loan. Shop around, and figure things out dollar per dollar (including closing costs, points, PMI/MIP, and any other fees) to see which is the cheapest way to go. For example, Countrywide, one of the largest national lenders, has the following rates for my area this week (all no points):
FHA 30-year fixed 6.25
Regular 30-year fixed 6.170
FHA 1/1-ARM 4.493 (only ARM they offered in an FHA loan)
Regular 5/1 ARM 4.473
FHA isn't always the best deal, just sometimes the only deal. And don't forget that for the above rates you'll have to add PMI for the FHA loans (the government does that for you by increasing the principal) or you can go with the regular loans and just get a home equity to make up for what down payment you don't have.