Yeah,
most people ask how to disable all the notifcations in WM5 (
Message Sent or
SMS delivery receipt) so this is
NOT for you!
For those of us who
do like the SMS delivery receipt but don't like how it works on WM5, try this
free app:
Name of recipient in SMS delivery receipt on WM5
Only 47kb in size and does what it says: replaces the number with the Contact's name as well as some other perks.
Get it HERE plus more screen shots/info (it's XDA forums again, so you'll need to register to download it).
I've attached the latest version (2.0) but you may want to watch that thread for updates.