So I just switched over one of our projects to jQuery this weekend, to see what all the hype is about. It’s pretty good. Most notable is that jQuery $() is the same as Prototype $$() [find by CSS selector]. There seems to be no equivalent to Prototype’s $() [find by dom id]. The switch is as simple as adding # [dom id selector] in front of your old prototype $() methods.

jRails is pretty good, I’d say it was 95% plug and play. Just a few quirks where I had to modify some parameters to my helper method calls.