Well, it's still on rumours level, but LH has ordered a bunch of them, and it's very likely that at least some of them are going to SWU. The first E190/195 will arrive 2009/2010 (to LH in general).
Big stepping stone would also be the LCY certification (of the E170/175). If that won't work, Embraers will most likely never make their way to Switzerland. One could think of outsourcing the Avro city pairs but also that is not very likely.
Thanks, F4F (whoever you are <grin>), I just started the technical refresher!
Dani