^ As soon as you exit customs, in front of you there will be an array of taxi stands (Manuel Tienda de Leon, etc..) who can offer you the transport of a Remis (taxi) for about $48 Pesos Argentine (aprox US$16) which you can pay with a credit card or in Pesos or in US$..

Though you can also go the stands next to theirs and probably pay US$2 less, but the difference is minimal.

Be careful they don't put on a bus that leaves every hour on the half.. (i.e. 11:30 and arrives @ 12:30).

And dont' take the services of any person offering you the service by word of mouth ... just go the counter in front of you.. it's located as soon as you exit and before you get to masses of people.. It's impossible to miss...

Enjoy Iguazu and be sure to stop by the Sheraton after a full day at the Argentine side of the falls for afternoon tea with fresh fruit (lots of it and it's about US$6 or US$7..)... well worth it as it's very assorted.. though it's only from 4 -6 p.m. (so don't arrive too late and be left with nothing..)... My g/f and I loved it as we were able to sit on their patio and enjoy the weather and the view of the falls ...

btw, yes.. it will be hot and humid!!
Btw2.. there is also a nature walk you can partake in (guided or alone) that takes you an hour into the tropical park area.. and if your knees are good. you can climb down at the very end of the path to the water level and suntan on the beach (but beware of mosquitoes!!)...

For the Brazilian side.. you can take a local bus that takes you accross in aproximately 1 hour (and it's FASTER because they are on a schedule and you don't really need to pay for a tour.. ask your hotel which bus to take as they come every hour if I remember correctly..

enjoy the falls and takes lots of film and a good pair of hiking shoes!! ^