I don't believe that in March 2009 when I wrote my reply so many people were using their phones and tablets as primary Internet devices. Still, I think a markdown or similar wiki-friendly input method would be worthwhile.

Even if the site just added links for URLs and auto-added paragraph tags for consecutive newlines it would be nice. We'd still need a way to denote code, and I like PM's way generally more than, say, Reddit's.