Stamps.com just released a new online reports feature...details are here:
"The new Reports feature gives you reporting on all your postage balances,
expenses, and prints.
|"Create tables showing your postage balance over time including postage printed, purchased, or credited."|
I use Stamps.com all the time for my business, along with the PayPal print postage feature. Another thing I love about it is that you can save the addresses of people you ship to frequently.