Philatelists, take note: to commemorate the impending handover of the Olympic flag from Beijing to London, a series of four special edition stamps has been issued. 'Cause there's nothing that says "Olympic handover" quite like, er, stamps. Anyway, the set of four, on sale in both China and Britain, feature the London Eye and the Tower rubbing up nicely against the Queen's profile, while the Bird's Nest stadium and the Corner Tower of the Forbidden......