If you upgrade now you will go to IOS 5.0.1 which comes with lots of new features. Have a look at these 2 links for how to do it. It's a good idea to disable your virus protection on your PC/Mac while you do it too.
[video=vimeo;30421920]http://vimeo.com/30421920[/video] http://www.ipadforums.net/ipad-faq/50385-how-do-i-upgrade-ios-5-a.html#post345719
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.