One of the most common questions I see on twitter from people is "I need help with jQuery, any experts around?"
While this is definitely a fair use of twitter. Being an "expert" in jQuery I don't want to reply back with "Yes, I can help" without knowing what I am getting involved in.
But not to fear there are plenty of places one can go to get help online.

My favorite place to get help is Stack Overflow (
http://stackoverflow.com). Stack Overflow is the Yahoo Answers, Experts Exchange for programmers. And the great thing for jQuery programmers is that there are a ton of jQuery experts hanging out there. jQuery questions seem to get answered almost immediately.

For more official help try the jQuery Group on Google Groups (
http://groups.google.com/group/jquery-en?hl=en). This is a great place to get help as most of the plugin authors and jQuery core programmers are hanging out in here to help.
IRC Channels
If you require more one-on-one help you can jump in to the
jQuery IRC room where at any given time there are 400+ jQuery developers hanging out and talking jQuery. Use the following information to connect to the channel.
For general discussion and jQuery development, please visit:
Server: irc.freenode.net
Room: #jquery
For jQuery UI discussion, please visit:
Server: irc.freenode.net
Room: #jquery-ui
Good luck!