Here is a list of the official team rosters.

Gryffindor

Captain: amyliaz

House team

Keeper: all4oliverwood
Chaser1: Dainsie
Chaser2: Edge
Chaser3: fang01
Beater1: geraldinechang
Beater2: MusicGirl87
Seeker: amyliaz

Reserve team:

Keeper: FnG_rawkMYxworld
Chaser1: Harry-Ron-HermioneONLY
Chaser2: HPGryffindor08
Chaser3: fredweasleysmyhero
Beater1: AnimagusSnuffles
Beater2: Chocolat64
Seeker: Harryshottie

Ravenclaw

Captain: Ron Potter

House Team:

Keeper: swedishharrypotterfan
Chaser1: Raven4life (co-captain)
Chaser2: lightstar1154
Chaser3: Emily_Potter
Beater1: ~penelope_johnson~
Beater2: Rowena Ashkevron
Seeker: Ron Potter

Reserve team:

Keeper: MorningEmbers
Chaser1: Hermoine3000
Chaser2: RupertGirl5
Chaser3:CrazyMutant2000
Beater1: Coolant661
Beater2: Anhaire
Seeker: Bubbles01002