I'm not a gmail hater. But I'm not a google or gmail fanboy either. It's a company and a product, like any other. But it is part of standard internet posturing to whip up the fanboys on both sides of a product. The all time classic actually being MS vs. IBM in their windows/OS2 battle. (Guess which won.) That's what we're seeing now pretty much. It's a key component of promotion for computer products on a level greater than many other markets.
I'm not a Gmail detractor. The 1 Gig is nice but frankly not revolutionary. Everyone knew inexpensive storage was coming. They just weren't sure in what form. Email makes sense because it limits bandwidth issues by keeping the data in system.
The "Conversation" threading is really the only standout IMHO. It's a nice feature, but I think they could have taken it farther.
Overall, the conversations and Gig is nice. On the other hand, there was no virus checking when I tried the service. Also, where's the address book? Then, Google specifically doesn't want their users to add functionality or use a client. That's fine if that's what they want, but I'd rather use a service that doesn't prosecute users who like such features.
So there are arguments for or against Gmail even before we get to security issues. Which I too think is rediculous. I mean, if you think that Gmail is insecure, then read this:
US court allows email interception I think all the major web based email clients have been hacked at some point. Remember the Hotmail backdoor? Gmail will be no more or less secure than their competitors.
Oh, and don't get caught trade those invites.
Google doesn't like it.