Mobile Entertainment Expo (London Baby!)

I will be flying to London tomorrow morning for a two day Expo. Mobile Entertainment Expo 2003 will be held in Islington, London on 8-9th April. (I will be there ;)

Anyway, the thing is I will have 3 days in London before the expo and I wanna spend those days really effective. "Attaractions & Events"... So I started searcing for advices and I found LondonTown.com...
VisitLondon.com is the official website for the London Tourist Board...
LonelyPlanet's London Section is another choice... I won't put more links here because after a while everything gets mixed up and in fact London is the same London. From Avantgo I downloaded some city guides (bars & pubs in fact) to my ipaq, you can find lots of applications for a pocket pc tho...

Anyway, my main motivation is taking photographs and any ideas, places to see, advices are welcome. If there are any Londoners or London lovers reading/hearing me; just tell me where to go, where to eat, where to see, where to entertain and of cfourse where to take photos... Thanks in advance ;)