">>whats up with text messaging. Why are we not allowed to send these on the Nextel server"
A workaround is to send an email to <10-digit-phone>@teleflip.com
such as firstname.lastname@example.org
.... This will allow you to send an outgoing SMS message from a Nextel BlackBerry to any North American BlackBerry.
You are out of luck for International SMS, but this technique works perfectly fine for North American SMS.
There are a few Blackwizzle Bunnies here, though: http://www.blackberryforums.com/viewtopic.php?t=269