UKash is not an option. There is just one company selling coupons and only in Buenos Aires.

Me and a few others are already buying/selling bitcoins at bitcoinary.

https://www.bitcoinary.com/en/users/718/profile
https://www.bitcoinary.com/en/users/1174/profile

As for the acceptance, a lot of us are confused and many think you can only get bitcoins by mining. There are a few discussions on reddit to read:

http://www.reddit.com/r/argentina/comments/zrjma/hay_otra_soluci%C3%B3n_a_los_dolares_bitcoin/
http://www.reddit.com/r/argentina/comments/ztf3h/bitcoins_che/

We certainly need to promote Bitcoin here and make people understand it can really work.

Regards!