As for including cosmix, exogini, and customs - I would disagree. But it's a 100% subjective argument and both sides have sizable, valid arguments.
I think I'll avoid including exogini and customs but if the time comes when I get desperate I may at least include exogini as I definitely don't think customs are genuine bootlegs.
OK, I'm going for it! I'll post a need toys post later on today and I'll keep my progress updated on my blog
So far I have three bootlegs so I have a long ways to go, I had more but traded them but it was worth the trade.
I'd like to see people put together their pictures of bootleg MUSCLE mash-ups too. Again, I know a place that would be happy to house them. 
I think any variations and information about bootlegs would be a very interesting to learn about. I'll keep veers up to date with any of my findings as I go about collecting them. I hope other people help him out too. I have next to none experience running a blog but I am learning how much detication and time it actually takes! So I encourage people to help veers out as much as possible with any info that can be found as it is beneficial to all of us and it helps our hobby grow.
Thanks for all of you guys help and hopefully I can get this thing started soon!

After a quick sort through my bootlegs, I have come up with 139 unique M.U.S.C.L.E. sculpts:
IMG_3371.JPG 122K
56 downloads
I probably have a few more knocking around, but this shows that more than half of the M.U.S.C.L.E. sculpts exist as bootlegs.
Fuzz, that is a very impressive bootleg collection! You're closer than I'll be in a long time! If you want I'll keep you in mind as I collect bootlegs to see if I get any doubles of ones that you don't have.