Check this out   especially the Video's  of this 20 gms Quad Rotor
http://www.rcgroups.com/forums/showthread.php?t=478730

http://www.smartflyer.de/

As they say for multi rotor's  knowledge of German is essential 

sai

Now thats what should be the next step in Aeromodeling!  May be after Pi and 0, world is looking towards India for Flying Soccer!!

Well here is URL for non German speaking people (Google Translate  )

http://translate.google.co.in/translate?prev=hp&hl=en&js=y&u=http%3A%2F%2Fwww.smartflyer.de%2F&sl=de&tl=en&history_state0=

Thanks Mr Sai for the link!
-Uj