I've not decided yet, LCG.
I had an early birthday trip to London last Friday (with a friend who lives in Italy but who was here for a while and who was treating me). We went to see the special exhibition at the National Gallery, which features the work of my favourite artist (Joaquin Sorolla) and added on the exhibition at the neighbouring National Portrait Gallery, which featured the work of my favourite living photographer (Martin Parr).
If anyone's visiting London I can highly recommend both exhibitions (as well as the excellent Thai food in the Lemon Tree, just around the corner from there).
I might go back to London on my birthday to see the Diane Arbus exhibition at the Hayward Gallery or I might find my way to the coast.