I just signed up for a trial of E-Junkie and your feature-set looks pretty damn awesome. Integration is a snap and your prices are way lower than anyone else I've seen. I don't know how you do it!
I see you have a very flexible shipping calculator, but I'm not able to work out how to meet my shipping needs. I would like to ship any combination of t-shirts (different products) for a flat rate between 1-3 shirts, and then with an incremental charge of 50p per shirt above that. Is this possible?