RE: The best travel carriers
Is this something that you just want to use in the airport? Or will you also want to use it during your travels (like in zoos and museums for extended periods of time)?
If you just want it for the airport and for the occasional babywearing need, then I would get a sling. They are very compact and perfect for air travel. If you want one for more extended carrying, then I would go with a back carrier, like the Ergo or even a hard or softframed backpack carrier. That will be much more comfortable for extended carrying. We checked a Kelty backpack for a trip from Dulles to Paris last year with no troubles.
There is no real weight limit for slings. As long as your baby fits and you are comfortable, there is no problem. Zolo does have distributors and they are sold in a few retail stores, but none in the DC area. There may be distributor in the area, but I don't know of one. I know that there is a store in Occoquan called Two Girls and a Boy that carries Maya Wrap slings if you wanted to try one of those.
Where do you live in the DC area? There are lots of us here with various types of slings. A mama here may be able to help you out.
HTH,
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)