There are many activities for you and your malinois.  You have to find one that suits your interests, lifestyle and physical abilities.  

Belgian Ring (NVBK) - Founding program for malinois

French Ring - Protection Sport with origination in France (duh) 

PSA - Protection Sports Association is a growing sport in the USA and abroad.  It will test you and your dogs training abilities.

American Schutzhund - New organization bringing back the schutzhund of old.  There is also other similar sports like IGP and different organizations support these events.

PSA and AS organizations can be researched here: http://www.psak9.org

If bite sports are not for you, there are plenty of others.  Agility, dock diving, herding and others.  

The bottom line is to enjoy your dog and whatever activity you choose.  But choose something.