I have added author pages to my company blog recently. Although I've no trouble pulling through relevant fields to populate the page - e.g. Author Name, User-profile, etc, I would really like to be able to add a small amount of html to the user-profile. Currently the whole thing is just dumped onto the author profile page - you can view my sample here.
Although we can add anchors, it seems to strip out other html tags. I presume this is some sort of security feature to prevent external users from adding malicious code. However, membership isn't open, and we could really do to be able to add a bit more structure to the text.