[inquisitor]

You should better use the "Internet" settings instead of the "WAP" ones, since with the WAP settings all data will run through a so-called WAP-Gateway, which may limit internet access to web browsing, so eMail, instant messaging and other services that are not accessed through the browser perhaps won't work.

In the Czech Republic (and the rest of the EU) blau charges data with € 1.90/MB (vs. 0.24/MB in Germany) billed in 100KB-increments, so you should use data only if really necessary. Outgoing calls to the EU cost € 0.51/min while incoming calls (no matter where they originate) make € 0.22/min. Calls to destinations outside of the EU are charged with € 1.49/min - so calling home to the States will cost you a fortune. You should better tell people to call you instead of you calling them.

Regarding your general question on alternatives for blau, which you've sent me through PM, there's Fonic with cheaper international rates. Allthough they also demand € 0.09/min for calls to the States, they do not have a call set-up fee of € 0.15.
Regarding data usage, I suppose you won't be generating too much data volume, as your LG Cookie does not support 3G and so data transfer will be quite slow. Against that background I expect you'll be using the standard volume-based billing, for which blau and Fonic charge both € 0.24/MB, but blau is slightly cheaper due to their smaller billing increment (10KB vs. 100KB).