Perhaps an option to enable this or not, it would be off as default for security purposes.
When the link is sent in the new format it is shown if the option is enabled, otherwise just the URL is shown.
And instead of that <A HREF.... format, maybe a control key, methinks CTRL + A, http://www.mirc.com mIRC! as an example.
--edit--
And if possible, perhaps have them show up in the ^u^k12url^o format, just like default webpages (this of course would be an option to change the format or turn on/off).
