Devil's advocate... Enjoy your iPad right now but DO NOT upgrade to iOS 4.2 quite yet. Why? As you use that iPad you are going to learn a lot about what it does and
what it can potentially do. Give yourself some time on some of these forums:
Mobileread iOS Forums -
https://www.mobileread.com/forums/forumdisplay.php?f=170
iPad Forums -
http://www.ipadforums.net/forumindex.php
Once you see what is available and doable with Jailbreaking and workarounds you'll see that the latest iOS isn't always the best one to have.
Welcome to the awesome world of iPad!