How do I combine ActiveRecord results from multiple has_many :through queries?
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Basically, I have an app with a tagging system and when someone searches for tag 'badger', I want it to return records tagged "badger", "Badger" and "Badgers".
With a single tag I can do this to get the records:

    @notes = Tag.find_by_name(params[:tag_name]).notes.order("created_at DESC")

and it works fine. However if I get multiple tags (this is just for upper and lower case - I haven't figured out the 's' bit either yet):

    Tag.find(:all, :conditions => [ "lower(name) = ?", 'badger'])

I can't use .notes.order("created_at DESC") because there are multiple results. 
So, the question is.... 1) Am I going about this the right way?  2) If so, how do I get all my records back in order?

Any help much appreciated!