Most of the order management features are not really there yet...
After only 4-6 hours of working with MarketPress, I have found lots of missing functionality that prevents me from selling products (rather, prevents customers from paying me!)
1) no invoice printing;
2) no customer account portal with purchase history;
3) no 'bill me later' payment option;
4) 'Buy Now' button comes installed and auto-linked to a weirdo website...someone's playing tricks in your dev group!
5) poor/absent Product page configuration
6) inflexible store page naming..needs page named "store" or else!
I could go on, but WOW six should be enough.
Jason Schwartz, Technical Director