Back to the Mac Mini and iBook.
For a Mac Mini, I would like to see 512MB RAM standard, a slight processor speed bump, and 64MB of video RAM. Other things would be nice, but that is what I really want.
As for adding ports and such to the Mini, I don't think it will happen, but if it did, to free up some space, Apple could ditch the VGA/DVI port and replace it with a vertical mini DVI port. Then, in the package, they could include a mini DVI to DVI and mini DVI to VGA adapter. That would free up some space. Then they could put maybe another USB port. I think there is enough room on the current model to put an audio in/mic in port. You move the audio out port down a bit, and put the audio in port above it. The more ports the better, IMO, but I can just buy a hub for around 40 bucks if I have to. My main wants for the Mini are what I stated above..
As for the iBook, pretty much the same as the Mac Mini. Maybe a 13" screen though. 12" is too small, but 14" is too big for portability, IMO.