Everyone wants the ability to start a new line in a Little Card Editor post. I do too. But I didn't want to hack it in, I wanted to do it right. I think you'll agree it was worth the wait.
Here's a screen shot:
You'll notice that the text area at the top of the canvas is now a little taller.
You can type more than one line in the text area. You start a new line in the natural way, hit the Return key. That will force a line break in the text on the card. You can see the result in this little poem I wrote about the famous developer of Netscape, venture capitalist, tweetstormer and all around great guy, Marc Andreessen.
That's it, nothing more to say about the feature, other than it seems to work!