So what do you want to do with jquery?
For example you could:
Use Jquery UI for theming,
and Jquery tabs for menus,
and JqGrid for working with a Restful Rails app.
You could also do some animation effects with jquery if you want.
If you just starting Rails, I'd recommend you
Widgets/Tavnav for menus
ActiveScaffold for automatic view creation.
Feel free to look thru my blog,
Actually i want to make modal window using jquery..
but i have not tried ever..
so can you tell me how to start up with jquery...
i m using rails 2.2.2
so what version of jquery i should use...
kindly let me know