This forum looks like a really great resource. I've done a bit of searching and I didn't have much luck finding out answers to my questions, mainly because I kept getting sidetracked when seeing other interesting threads in the search results. Anyway, my first ever BlackBerry (Pearl) should be arriving tomorrow and I've got a few questions that experienced users might know:

We run an Exchange server and I am planning on downloading and installing BES Express. From what I can tell it comes with a single CAL, so will I need anything else?

Is it hard to configure the BlackBerry so I only synchronise my calendar? I don't think I would use the remote e-mail much.

If I use the Pearl for listening to audio files on the way to work, does this drain the batteries significantly?

I'm on the unlimited data plan with Optus (Australia), does anyone know if this plan includes unlimited tethering?

Thanks in advance!