An article in the new Smithsonian Magazine, "Mapping Galactic Foam." (don't accuse me of doing mushrooms, people...that's really the title, it's really there!) uses the phrase "...--or mind-bogglingly huge" in it's opening paragraph. The extra -ly sounds redundant to me, I probably would have just used "mind-boggling huge." But I also have always thought of the word as a two-word phrase: mind boggling. I looked it up on the Webster-Merriam online dictionary (the word wasn't even listed in my shelf dictionary--peculiar), and found both usages listed in hyphenation: mind-boggling and mind-bogglingly (dictionary debut date--1964). But even if it's acceptable, I still don't like "mind-bogglingly" -- it sounds like the needle is stuck on the record (for those of you old enough to remember that annoying occurrence)...I just can't get comfortable with that dangling "-ly"! Thoughts, folks?