I've been thinking about the streetcar proposal over the last few weeks, and I have to confess I don't really understand the attraction. I mean, we're talking about a fixed route over an easily-walkable area. Where's the benefit?
The attraction of streetcars (or trams as they're called in Europe) is that they criss-cross the entire city, connect to outlying towns, allow easy transfer to national transportation networks and have ample room for cycles (see Amsterdam as a perfect example). Many add subterranean routes at great expense to existing cities to avoid traffic congestion on the surface (see Sheffield or Manchester, UK).
http://en.wikipedia.org/wiki/Trams_in_Europe
It seems that some here are almost suggesting that the streetcar system would be an attraction in itself rather than actually serving a useful purpose. Not sure how a bus with metal wheels would reach the status of attraction.
For GR, I'd rather see a night bus schedule that runs from downtown to outlying burbs until after the last bar, theater, club closes. This would solve parking, polution and drink-driving issues all in one go. Also, routes can be changed at will without needing to dig up the road. Something that we have all too much of around here as it is!
Please enlighten me if I'm missing the point.