You can now connect to any T-Mobile Hotspot with your PSP prior to March 28, 2008 and get six months of free wireless. I have not tried this yet, so if they ask for a credit card during sign-up make sure you remember to cancel before you’re actually charged.
If you don’t already have a PSP, consider the White PSP from Play-Asia. It’s way sexier than the black PSP sold here in the States.
How to Set Up Your PSP For 6 Months Free T-Mobile Hotspot Wireless Access