CurdBee: Free Online Billing Application

Skimming Lifehacker today, I read about CurdBee, a free online billing/invoicing application.  I use Blinksale currently for my invoicing, and CurdBee is very similar.  It accepts both Paypal and Google Checkout payments and can convert other currencies like Euros.  I like Blinksale, but since Curdbee is offering a similar product for FREE, I will set up an account to see if it works for me.