Just thought I'd point out the latest iphone/blackberry geeky app thing: foursquare is all user generated local reviews and tips of things to do in twitter-sized chunks. Ideal for SGR and around.
I'm still trying to get to grips with it, and I'm not quite sure about it yet, but could be worth a look at if you have the time, inclination, and gadgetry too...
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my housemate just shot the adverts for it with the new girl on countdown, so keep your eyes peeled....