By luck, I just found out that mootools 1.1 was finally released (minutes earlier). Major changes and improvements in this release (I have been working with the dev version for a while now, so I should know 
).
Quick download link: the modular download builder.
You might also want to check what’s new or the changelog, but you’ll definitely want to see the spanking new demos and I’d advise you have a browse through the new docs as well.
On the forum post announcing the new release, the future sure looks bright, with anewton promising a revamp of the now famous “Mootorial” (a comprehensive mootools tutorial) and the devs promising more goodies to come.
Yay for mootools ! 