codeyf, you are right about the FLASH ROM, it is only 2MB on the Palm Vx/C3. However, there are multiple versions of Palm OS4.1, the one that ships in Europe needs the 4MB flash ROM (on Palm M500/505/515) because it supports 4 languages (French, Spanish, German, and English I believe). The US version can be stripped down because it does not feature the extra languages. As well, the Asian versions of the Sony Clie N-series (N700-series) have more Flash ROM than the American models in order to hold all the Asian font information. If you play around with Jack Flash, you will see what I mean.
But there is a OS 4.1 upgrade of the Palm Vx now since I have it running. And unlike what Compaq did for the 16MB ROM Ipaq, Palm did not have to strip down the OS and force you to install some of the programs in RAM.
Guys, you are going to LOVE the size of this PDA. I would recommend the use of a Hard Case with it, so you don't have to worry about crushing it when you put it in your Jeans' pocket.
And if you have an external modem (with serial connection), you can just buy a null cable adapter and a Palm Vx serial cable (cheap on egay) to connect to the web. I actually use the Palm V Modem (33.6kbps) and the speed is pretty good. Very convenient on short business trips (2-3 days) when you don't have to carry your laptop around (and unlike Pocket PC, the battery will make it without any problem so you don't have to bring a charger with you).