For air travel I have two:
1. Roxy by Petote.
http://www.petote.com/
2. Active Tote-o-Pet in Vanilla with Brown Straps by Celltei
http://celltei.com/toteopet.html
I like both, but the Celltei is my favorite. It seems a bit roomier and has more pockets including a cell phone pocket. And pockets on the inside.
I believe that
www.imapreciouspup.com is going to start carrying them.