Finally I took the plunge and buy a cloudmobile before christmas ;-)
I flashed the leaked jellybean and unlocked the bootloader as soon as my battery was fully charged and that I checked I had the -3 version
yeah, living dangerously ;-)
Everything is working well, I am waiting to have a microsd before adding CWM, maybe there will be custom roms at this point (I miss CM10, even if the acer skin is not too intrusive, all the little tweaks of CMW are not there...)
Phone is nice, screen is great, battery is awful...and I miss a notification led....but still, no better deal for this price ;-)
Only strange thing I got with the leaked rom was a few crashes during a download using a very bad access point...I had a blue screen (really like the blue screen of death in windows, fist time I see something like this in Android) due to a full system crash, telling that it will dump memory on SD in 10, 9,8,... seconds. Well, no sd at the moment so obviously no dump, but I had to remove the battery to reboot from there. A few time cause it kept crashing during this download...
This leaked JB looks like a debug build to me, so I am not so sure the bootloader will be unlockable in official JB....So this leak may be a life saver....and I will be very careful before flashing official JB.