Submission option

Can we get an option to have Enter submit our post, and Shift-Enter for a carriage return? That would be dandy, especially considering that the "submit" button always starts well below the bottom of the screen for me and it's really annoying to scroll down every time, even when I'm just making a quick reply. Also, on that note, there should be a submit button at the top of the posting area as well. (Love the auto-preview, though.)