Welcome. I'm the Blackberry admin for our company (a major office furniture manufacturer) and am currently using a 7100i (but have also used the 7520 and 7510....eek!).
Blackberrys are taking a backseat for me right now, though, as we're involved in a major deployment of VOIP phones and I program those, too. But I still visit the forum at least once a day.
The only advice I have for you, as a newbie, is to make sure you search, search, search, before posting a question that has been asked countless times