I can't believe this got by me for so many days. I think it shows how burnt on work I am, regardless, while working on a new project today I went to go check on my favorite js framework Prototype and saw that 1.7 has been released.
There is over 50 improvements since the last stable version, the addition of the Sizzle selector engine by default and the new Element#on method which rocks!
You can read more here: Prototype 1.7 updates
The cool thing is that there is even more planned already for future releases and resuming work on script.aculo.us 2.0!
Read more here: Prototype 1.7
So what are you waiting for? Go get and start playing! http://prototypejs.org/download