Saw this last night - very funny. Tim Curry was great as Arthur - not ingenuous like Graham Chapman was in the role, rather slightly sexually subversive in his Rocky Horror Show way. Lots of laughs, lots of silly jokes, lots of risque jokes, and lots of dialogue from the original film too, which of course the audience loved. ('I fart in your general direction! Your mother was a hamster and your father smelt of elderberries!')
I particularly admired 'Ye Olde Rippe Offe Shoppe' in the foyers, selling Spam sandwiches, special tins of Spamalot spam, 'Fetchez la vache' Tshirts, coconut shells for horse hooves and fiersome Rabbit of Caerbannog hand puppets complete with Big Pointy Teeth.
We also tried out Gaby's on Charing Cross Road (just south of Leicester Sq tube station), which I have walked passed a hundred times but it looks like a dubious salmonella emporium from the road. In fact it's a very popular Turkish/Greek diner and the food was pretty good. Starters great (vine leaves and falafels), lamb kebabs perhaps a little dry though. But very busy, which always bodes well. And they gave us free dessert and another half bottle of wine on the house. *:)