1) William Paid in Chicago, with them you pay them your rent each month, then send payment to the landlord. They are really good if you have roommates, as you can split payments and both renters can report. Service is $5 a month.
2) Rental Kharma in Denver does a bank level reporting of data for a $10 one time fee. With rental Kharma you can report up to 2 years of past payment information.
3) Rent reporters does a landlord verification of payments each month. I think they charge $10 a month.
I'm sure there will be more options in the coming years as reporting rent gains popularity.
With USDA financing people with scores less than a 640 who are manually underwritten are *required* to have rental history, and generally scores less than 620-640 are manually underwritten, so having a rental history wouldn't help "offset" low scores with USDA financing.