@jimp:
The time estimate is not possible, but the total number and current package should be.
Well that still gives you the info that I was talking about so I'd be happy :)
@Keljian:
Even if it's not precise, at least you know roughly at a glance: a. it's doing something and hasn't hit a hard stall, b. where it's at.
So revised "Currently installing X of Y packages, Current package: <foo>- #% complete"</foo>