when to visit London

[Joy M]

Hi all -- I'm supposed to make a trip to London in May, but I might 
be able to switch it to June and come for the Big Release.  Do you 
have a sense of what will be happening for June 21?  Do you think the 
OoP release events will be fun, or just so much media hype?  For 
those of you who were around 3 years ago, were the GoF events 
worthwhile, or worth skipping?  Thanks.

--Joywitch