According to the site I listed above: (and we all know that if it's on the 'net it must be true)
The ellipsis can also be used to indicate a pause in the flow of a sentence and is especially useful in quoted speech:
Juan thought and thought . . . and then thought some more. "I'm wondering . . ." Juan said, bemused.
And also from the same site:
If the omission comes at the end of a sentence, the ellipsis will be placed after the period, making a total of four dots. . . . See how that works? Notice that there is no space between the period and the last character of the sentence. And finally,
The plural of ellipsis is ellipses (in case someone asks), but the points themselves (the dots that make up the ellipsis) are called ellipsis points or ellipsis marks.
Mary (NOT a pedant!, really)