They are called Boltblue (Boltblue.com). In terms of product offering they're very unexciting: just your bog-standard ringtone/wallpaper company. But I had to i

They are called Boltblue (Boltblue.com). In terms of product offering they're very unexciting: just your bog-standard ringtone/wallpaper company. But I had to implement payment systems and an SMS gateway in Java, going all the way down to SMS binary format because (at the time) they sold black-and-white "service logos" for Nokias, a crazy hack which fitted 160x30 pixel binary images into multi-part SMS messages. (There are also a couple other mobile products where it's useful to be able to format your own SMS) I learned a lot and the people who worked there were great, although it's not a company that's going places.