Thanks to Saul Klein I just joined Dopplr. It’s a sort of travellers network, I think! I’m not really sure, I can’t do much with it because I only have 1 friend. 
If you’d like to join, let me know, I’ll invite you and you can be my friend!
Callum Macdonald
Callum on life
I had an invitation before, and I didn’t use it! But I’m still receiving their email. You can send me another invite. I’m afraid it’s a bit hyped though…
@Kasper: It does seem pretty hyped, I’ve no idea what it actually does beyond telling me if any of my “friends” are in the area where I’m going to be…