Last night I used Live search to find more info on ‘upload ringtones’.. And this is one of the many results I found:

Sony Ericssons first mobile broadband ExpressCards save busy professionals time with instant Internet connectivity. Barcelona, Spain 10th February 2008 Sony Ericsson today launched its first HSPA 7.2/2.0 devices with the ExpressCard/34 form factor, the EC400 and EC400g. Both mobile broadband ExpressCards help busy professionals on the go to save time by enabling instant Internet access, regardless of their location. Sliding easily into a laptops ExpressCard slot, the EC400 and EC400g all

Not exactly what I was looking for, but still a good read.