The first company I talked to was Telnic.org, a group which champions the use of the .tel top level domain as a type of global address book. There's a free iPhone app available for updating your .tel domain information from anywhere.
Next, I visited shortly with John from Agile Partners, the developers behind GuitarToolkit. TUAW's resident musician, Mat Tinsley, reported on this app last September and it's quite impressive.
Finally, I talked with the folks from myRete, who have created an interesting social networking app called WhosHere. There are over one million users of WhosHere, and with the free texting and VoIP capabilities of the app you can ask the locals in cities around the world for travel tips or a date. Want to perfect your language skills with a native speaker? WhosHere is an easy way to find someone to chat with.
As with several earlier videos, this suffers from a bit of mic noise. Our apologies!