If I were him, I wouldn't buy the N900, either.

If he had, and was in the middle of the road when he run out of credits he would realize there is no way to access his SIM card menu to get or transfer credits from his operator.

Of course the credits would have being drained because he was trying to use Maps/GPS without realizing that the maps were being downloaded from the network.

Or, because his zillion e-mails, many of which full of tarballs and patches atachments, were also being fully downloaded without him having a way to control it.

Sometimes "just works" is nice.