26th
Truphone
Demonstrating 2 products today. Uses VoIP, a new breed of operator, via wifi so can make calls with your iPhone. This is big news and has been all over the darn internets already:) Totally free, even though both phones roaming form the UK.
Also a Facebook application, with a call me button, as well as location tracking (permissions based) tied to IP addresses so that you can also tell where people are. This is very close to the “holy grail” of mobile social networking.
Now making an iPhone VoIP call. Integrated into the normal calling of the iPhone. Nice. First time this has been done, natively.

