These are all that I can recall but I know that there are more.

Weezer
deftones x2
linkin park
limp bizkit
tool
a aperfect circle
matthew good x4
finger eleven x5
NIN
nickleback
holly mcnarland
tragically hip
treble charger
billy talent x2
30 seconds to mars
metallica
everlast
metric
three days grace
Thrice
Thursday
The Used x2
death from above 1979
alexis on fire x2

currently have tickets for:

sparta
brand new
rod stewart

nine inch nails are playing a lot in the week at Brixton, anyone going?

I don't like all of these,but oh well, here goes:
Fall Out Boy
Silverstein
The Academy Is...
The Transplants
Atreyu
Protest the Hero
Job For a Cowboy
August Burns Red
Arise and Ruin
Bleeding Through
Walls of Jerhico
Over the Top
He is Legend
18 Visions
The Black Maria
Pouffy-Poup
Anti-Hero
Scary Kids Scaring Kids
The rest are just local bands like, Machete Avenue, We Like the Agenda, Angry Agency, etc...

Jean Michel Jarre in the Docklands
The Freddie Mercury Tribute Concert
Metallica in Iceland
Black Sabbath In Iceland
then a whole bunch of bands you would never have heard off, but the list is...

Jeff Who?
The Sugarcubes
Salin Hans Jons Min
Irafar
Studmenn
oh god i can not remember all of them, but in total about another twenty odd in iceland, all icelandic groups

i heard Blur are in the recording studio again this summer trying to make a new album. if that goes well they will do a tour and i will go and see them as my next gig hopfully.

id go just to hear them play tracy jacks if i had to go for one song lol

heres the gigs I remember

T In The Park 2000.2001,2002
All Saints
Ash
Basement Jaxx
Bootleg Beatles
Beautiful South
Blink 182
Blondie
Bloodhound Gang
The Bluetones
Blur
David Bowie
Ian Brown
The Charlatans
Daft Punk
The Dandy Warhols
The Deftones
Depeche Mode
Duran Duran
Feeder
Foo Fighters
Happy Mondays
Joe Jackson
Jamiroquai
Beverley Knight
Levellers
Mcalmont and Butler
Madness
Manic Street Preachers
Muse
Oasis
Ocean Colour Scene
Prodigy
R.E.M
Simple Minds
Stereophonics
Supergrass
Weezer
The Jamm
Complete Stone Roses
The Coral
Razorlight
Subways
The Killers
Futureheads
Bloc Party
Kaiser Chiefs
The Hives
The Streets
The Beat
Neville Staples Specials
Limp Bizkit
Ordinary Boys
Sugababes
The Bravery
The Dead 60s
Nelly Furtado
Kasabian
Bombskare
Amphetameanies
the Buzzcocks
The Stranglers
Roxy Music
The Strokes
I got tickets for Bluetones,Inspiral Carpets and The beat coming up this year

4got bout these bands

Bad Manners
Sparks
Hard-Fi

I have seen Tina Turner in '86 (showing my age there) Knebworth in '90 (I think).... where I saw so many great bands....Tears For Fears, Pink Floyd, Eric Clapton, Genesis, Mark Knopfler, Paul McCartney, Robert Plant, Cliff Richard, The Shadows and Status Quo. And my most memorable one which was Eminem at Milton Keynes Bowl

ive seen guns n roses, when they were at their height, oasis twice, ian brown 3 times, underworld, badly drawn boy. and some others that i cant quite remember.

I saw The Who a few weeks back at the O2