You can enter text into Basecamp discussions, to-dos, and text documents. And you can use basic formatting like bold, italics, lists, and quotes.
However, I once copy/pasted text from another program and saw an inline hyperlink appear ("some text" anchored to a web address). I really want to use inline links, but I can't figure out what markup is required.
I tried the basic Textile link syntax and a variety of Markdown formats, but nothing worked.