Well, I have managed to "activate" the MSN & ICQ and even added a field for an AVATAR URL. And it works fine however, I fudged somewhere or I am not understanding something:
I now can't delete entirely a profile field. For example, if I have something in my YIM field then decide to delete it completely and leave a blank field and then update my profile it will still be there. HOWEVER, I CAN modify the entry and type in 'n/a' or whatever and it will update it that way. It just won't allow an empty field... odd.
Soooo, at least I got it to this point. Now to figure out the empty field bit.
As for the memb last visit thing, I would favor to say that it would probably be best if that were in a plugin. I can try to include that in my hack but the way my profile code is turning out-- it's looking pretty damn ugly. :) But it its working... kinda. ;)