[aufreak3]

It is actually great that they're doing this experiment 'cos if it turned out in a way that contradicted theory (which I think says "antimatter falls") then we might have to re-examine a whole lot of things!

For example, if antimatter rises, there ought to be a statistical preference for black holes to emit antimatter.

One of the posters on that site said CPT violation would be another great thing to check. Hell yeah!