LONDON -- Continuing on the theme of using technology on the road, I have 2 cents to add to the debate: music device or music on a cellphone.

For this two-week trip, I stored a few dozens songs on the new T-Mobile SDA phone I'm testing and did not bring a player. I've found myself listening to it frequently and thought it was convenient that I didn't have to bring another device and an additional set of head phones.

What's been particularly nice is I don't have to listen for my phone to ring while listening to music. If I were to receive a call, it would interrupt the music and I'd be able to answer with a touch of a button from the headphones. If the phone rang and I was listening to an iPod, for example, I may not have heard it ring.