Billings 3 review is now online at Macworld.com.
Billings 3 is a small business time billing and invoicing application that also allows you to create gorgeous estimates, invoices, and statements. I found that Billings provides excellent tools for tracking your time and I found the program’s collection of templates to be  gorgeous. Billings did come up short in a couple of areas, like integration with existing business accounting apps and ease of template customization, but overall I think it’s a great app.
Also, there’s an iPhone version of the program, with wireless synching, on the way sometime early in 2009.