Rails - Feb 2006 - newbie trouble with find method and dual many-to-many relationship

Hi,

I''m trying to do something which I think is fairly simple, but
I''m stuck on the
syntax.  Briefly, I have three classes:  users, groups, and blog_entries.  
There''s a M2M relationship between users and groups, and a M2M
relationship
between groups and blog_entries.  

I''ve got my classes defined ok, but in my "list" method for
the blog_entries I
only want to list those blog_entries that belong to groups of which the current 
user is a member.  Assuming that the current_user is contained in the 
@currentUser object, how can I write a graceful find command that will only 
return the records as stated above?

Thanks in advance,

Stan McFarland