We can already embed landmarks, images, and other full-permissions assets within notecards, yet even the most simple formatting of text relies on access to third party tools to employ Unicode trickery (with spotty implementation across various third party viewers and operating systems).
I suggest the addition of some basic formatting, Bold, Italics, Indents, and making hyperlinks clickable (perhaps using the standard [<url> Link Text] employed in other places within the viewer.
Even Canny supports formatting of text. Why doesn't the single most common method of providing information and product instructions within SL?
Heading
bold
italicized
bold italicized
  1. Ordered
  2. Lists
  • Unordered
  • Lists
code