fantastic! I typed "(at)GeoClique" [so that the link would work on twitter], and "(at)GeoClique" appears here - good thinking - does it work inversely? (I'll have to play with that later)

can I not type "g e o c l i q u e m e" without it being changed here?

There's a new fix in place so that if your Twitter username doesn't match your GC username, it will switch on the fly when cross-posting. Unfortunately, someone else took @GeoClique before I could grab it. Just like someone registered GeoClique.com and did nothing with it, so I couldn't register that either.