Is it a debit/check card? Your bank might impose a maximum transaction amount. (I learned about this while trying to check my wife into the hospital to have our baby.)
(If that's the case, you should be able to contact them to arrange to have that limit temporarily lifted.)
Flash seems to be working fine for me -- I have a YouTube video playing right now. Maybe a limitation of the PC builds? (I do see in the release notes a known issue with plugins under "some of the desktop builds"...)
I've been playing with it a little on my N800, and apart from still being pretty beta-ish it seems to be OK.
Having said that, I'm not sure I've figured out why I'd choose to use it on the Pandora over plain old Firefox...
Someone on one of the message boards did a port of wz2100 for the Nokia tablets that ran passably (although if I remember correctly there were a few things I couldn't do on my n800 without a keyboard) -- so I'd think it ought to be a good candidate for a Pandora version.
Vpnc (http://www.unix-ag.uni-kl.de/~massar/vpnc/) is an open source Cisco-compatible VPN client. It looks like it's been ported to Nokia's Internet tablets (https://garage.maemo.org/projects/vpnc/), so I'd think a Pandora port ought to be within reach.
There's a note at gp32spain that says that after updating you might need to go through the touchscreen test (calibration?) on the settings menu before the touchscreen will work properly. Might be worth trying for those having issues...
Maybe it's my GP2X (or perhaps I'm just getting old and my eyes are starting to go), but the orange and purple blocks were a lot harder to distinguish while playing than they are in the screenshot above.
I enjoyed playing, though...thanks!