WOW! You got some awesome ideas! Thanks for asking the question! My suggestion is a little less ambitious than the rest, and we haven't done it yet, so I don't know how profitable it will be. We are planning to cooridinate a subdivision rummage sale this spring. Each participating family will host its own sale. 100% of the proceeds from MY sale will go to CFF, and other famillies can choose to do the same. Most of my neighbors have already said they would give at least 50% of what they make. I think I'll try to get our little community newspaper to do a story on the sale, since its a benefit...maybe include facts about cf or about Emily...raise awareness that way and attract shoppers to the sale.
One other thing that we're doing (Except we're doing this one to benefit Children's Hospital, not CFF) is to have a spare change drive. The neighborhood kids will get together to decorate empty peanut butter jars and we'll put a letter inside explaining the collection and asking people to collect their pocket change for one week or two. We'll deliver the jars to every home in the subdivision (currently about 40). On a designated date, we'll pick up the jars that people can leave on thier porch or in thier mailbox...(we have a very tight knit community, so I'm not too worried about theft...). Local dj's have a three day radiothon for the hospital each year, and they call this sort of thing "Change Bandits." They collect thousands of dollars in change from people doing things like this. I"ll be happy if we make $100! Every little bit helps.
Good luck!