ah great..didnt know you would place them on new domains :-).
I think the multilingual pcc thing could be interesting, too as the search engines market share differs quite a lot from country to country..Google having >90% market share (Ive heard higher estimations, too..virtually anyone uses Google and nothing else here).
On the one hand that could mean that for PPC one only has to learn about adwords, but on the other hand maybe most people in Germany are only doing adwords and one could get nice profits from some of the other engines? or maybe it just strikes a balance which would be boring
I assume in other countries it could be even more interesting..where Google does not dominate as in the US or Germany.