For what it's worth, I'd also really like to
see both a "displayname" column (so that ~TDS can be
displayed as "Tim", ~kate as "River", ~daniel as
"Duesentrieb", etc), as well as a "homepage" column.
Such as http://tools.wikimedia.de/~leon/toolserver/
And yes, it would be nice if it was user controlled.
I'm working on it, no idea when it's ready.