Got my Curve 8900 a week ago after constant harassment for about a year from friends. Comments like "Oh my god, how can you not have a Blackberry?" accompanied with disgusted looks and "You need to get a blackberry"
Check out the BlackBerry 101 How-To Lecture Series ! This will help you with the basics such as downloading apps, themes, wallpaper, ringtones. It's also a good idea to browse the forums and read as much as possible. Many questions you have are answered there already!
Thanks all. Chrisy...this phone is outrageously user friendly...that I barely have to make any effort to understand how to do anything on it...downloads et al. are so simple. Thanks.