Argh...
it's you
Nothing has changed about your phone, other then Sprint enabling more and more features, better and better roms (even stock roms) and kitchens, etc, etc.
Sure, new phones with better specs come out every 6 months. That will happen forever. Get used to it, or be prepared to pay a premium to constantly upgrade to the latest device.
Just a little rant myself
You should get the touch pro. Then you should get the touch HD. Then you should get the G2 (not the G1, that thing sucks.) Then the iphone 4g with direct brain implant technology. Then...
You get the idea.
Technology is wasted on the wrong people (with apologies to "it's a wonderful life")