>- At Palm Pilot V and Compaq Aero i see the item INBOX: it means that it allows to connect to the internet, or it's just a "box" to keep messages that come from a syncronization with our PC?

For Palm's it can be either way. You will need a special modem to clip on your Palm, or a modem cable (not a hotsync cable) to connect to an external modem. I have no info on the current CE devices.