100 Top Free Font Combinations?

Now that the year anniversary of The Big Book of Font Combinations is on us, and Font Combinations App 2.0 has been out in the iTunes App Store and updated by nearly everybody, the time is now to ask: what about the legions of free fonts that are available? The first two products focused entirely on classic typefaces. But with the popularity of free fonts rising with each month, I now wonder about how those fonts are being used by those that download them. My question is simple: would designers find a book just like The Big Book of Font Combinations, but 100% geared towards free fonts, something useful? If you think so, drop me a line or leave a comment below. Thanks for visiting!