I would download the 4.2 SP2 software now for installation later, then when you get the 8830 in.

Charge/Install 4.2 software - Update to SP2 (if you want better media management.) Then activate the new BlackBerry, and set up your BIS/BES or whatever you want to.

For tethered use as a modem, that option is $15 a month extra from VZW.

Oh, and I'd recommend the Gmail app for looking for old gmail messages on the go, and Viigo for an RSS feed reader, if something like that interests you.