Oh I hated those things. Interesting term you use.
anyway, we always called them eraser heads. not only where they difficult to control, they broke easy, wore down quickly (I had a laptop where it became even with the keys - everytime I go to touch it, I ended up typing something). I also hated you pretty much had to wipe your hand off after using it. It was like an eraser, got that abrasion stuff all over your fingers once it started to wear down.
I do like Multi-touch. My whitebook is lacking some of the features of the newer macbooks, but what I do have I like. Better than a mouse, and I use my wacom for more precise things.