Lift/Scala is getting a lot of attention lately. Having worked with Grails in the past (and finding it quite handy BTW), I\'d like to know if there\'s anyone who has tried both
Grails is a very powerful framework with much more uptake than Lift.
I also feel that Groovy is much easier to learn than Scala.
Lift is not more secure than Grails
Lift may be faster than Grails (maybe, I haven't tested this)
You are not precluded from using Ajax, Comet or ORMs other than Hibernate with Grails
Check out the plugins available for the Grails framework for more info:
http://grails.org/plugins/