GitHub User: raywu
For those looking for has_many :through counter cache, here's a great post on stackoverflow.
In Rails3.0.5 you are now able to set counter cache to the "linker" model, in your case it will be:
class Meeting_user < ActiveRecord::Base
belongs_to :meeting, :counter_cache => "users_count"
belongs_to :user, :counter_cache => "meetings_count"
Anyone experienced prePopulate tags not showing up on Heroku? I can't explain why most of my tags do, but the one with id#1 doesn't