I found also
this thread but at that date there wasn't Messenger Plus!
Live hence BBCode support but now there is. What about [url] tags to insert clickable word links like
this. This would really useful for long addresses especially for the ones with lots of hashes inside them. People who use Messenger Plus! will see them correctly, but others who don't have Plus! will see them how they see other formatting codes of Plus! applied to texts, like [url=here]www.msgpluslive.net[/url] so they can still click them, Plus! will only change their look, as it does for colors and other formats in texts now.
And I have an idea for the security risk about people who use Plus! may not know what URL the link is linked to. You know Messenger Plus! Live can interact with the information area of convo windows after its 4.50 version. So this area can be used about the URL in the link. When the user hover the cursor on the link, its URL appears in the information area. That is good, isn't it?