Actually, while it is still technically alive,
'Darkness of Monkey Island' has actually been suspended by the team working on it, and it may not be revived (actually, I think I'm willing to bet that it will never see the light of day, unfortunately).
Also, for all who wish to know,
'Return to Monkey Island' is apparently going to get an English translation soon,
according to team. Though, five months have passed since that initial post, so... we'll just have to see what happens there. Either way, the game
looks great.
I've also been following
'Picaroon: The Lost Years' for over a year now, and I'm
really looking forward to it. At least there's one awesome-looking fan project that is looking like it may reach completion, or at least an
Episode 1.
'IWWHIIWWHITOMIROTPG: The Game!' is one of the few awesome
Monkey Island fan games that have actually been released as a finished product. I mean, it was very short, yes, but it was still on of the most professional-looking fan games that I've ever seen. And it was a great teaser for
RotPG teaser (the IWWH video). For all who are interested,
here's the thread in which all of the action and hype took place.
By the way, thanks for posting
'Carnaval Vudú', Wolfy! I wasn't even aware of this project, but might I say it looks awesome! Well, as awesome as fan projects go. I really look forward to the English translation so that I can actually play the thing (or maybe I should just learn Spanish

).
Also, we have a LOT of fan game titles
posted here, whether they be completed, ceased & desisted, released in demo form, etc. They were posted by a very dedicated fan gamer.
And, one more thing. While it is no longer in production, I thought you all might appreciate seeing some
concept art from a fan project by the name of
'Amulet of Monkey Island'. More
here,
here and
here. As for why this was never completed, I'm pretty sure it was another C&D. *Sigh*, I hate LucasArts.
'Prisoner of Monkey Island' was also another interesting-looking project, but I'm not exactly sure what's happening with it at the moment. There's meant to be some sort of
demo download on the
website, but the link is broken

.
Also, Irishmile, I agree. There's so much talent out there, and so many have attempted to make excellent fan games, but the best have either died or been stopped, and the ones that have been released have mostly been mediocre. If only, like you said, a large, dedicated team of fans could get together and actually bring us something of significant value.