Yes - my understanding is of the three/four dots depending context.

One of my big peeves with apostrophes is "CD's on sale." As with the kitten - (un)lucky CD! Who's going to buy him/her? Some say that you're allowed to have an apostrophe after capitals/abbreviations (as in the thread "P's and Q's") - but I say: why?? yes, I think 2x question marks can add emphasis sometimes!