MYRDINN  Okay.

It's getting worse.

I can connect to any Wi-Fi network, but mine, on my iMac.

Internet coffee works well... LOL Stores also.

I've tried everything, every resets available, on my iPod and on my iMac.

Disabling my firewall, create a new network, bla-bla-bla...

It sees my network, log (or seems to log) properly using the good password, then : nothing.

I'm going crazy.  
(Version 3.1.2)

MYRDINN  Since the upgrade to 3.1.2 on my iPod Touch 2nd generation, my Wi-Fi network died.

It sees the network, seems to connect to it, but anything else is a failure.

No MAIL, no APP STORE, no SAFARI surfing, no iDISK, no MOBILEME, no SYNC of any kind, nada. From now on, I'm living a nightmare.  
(Version 3.1.2)

MYRDINN  After reading the comments, I'm kind of persuaded that I'm the only one with this problem.

And it's a huge one! I've downloaded the software (multiple times, different versions), and I can't open the .dmg file. This file give me the worst crash I've ever seen on Mac OS X. Can't mount the file. Final. I've tried many thing, and everytimes, result is the same : I've to reboot to regain control of my iMac. Weird, isn't it? I did even tried to rename the file, just to see. As soon as the file is selected : crash city! As bad as the first one trying to open the file! This is supposed to be a great piece of software, but I'm stuck with Micro$oft Office, maybe for the rest of my life.  
(Version 3.1)