Isn't it easy enough to hit the blackberry button twice? Or hit it once and click send on the menu? If they changed it to the return key it would be a pain to put spaces in between paragraphs in messages.
Posted from my CrackBerry at wapforums.crackberry.com
yea it would be nice to be an option for sms and be different for emails. because my sms never have different lines they are for personal use. specially especially since theres only 160 characters. i use my email for business so it would be nice as an option only in sms. that way you could turn it off and not have to delete the app.