I've heard about these new miniture satelite being launched, do they have CW communication function? if so how does a Ham with CW rig use them?
if a satellite has a linear transponder, then yes you can use CW just like any other mode. there are several that do. you need to learn how to work through a inverted frequency, doppler shifting satellite... for that go to AMSAT: amsat.org for a start. also there are some experienced guys who hang out on the space and satellite forum who can help point you in the right direction!