The Church of England has published a Study Programme, see this press release:
Women Bishops in the Church of England? Study Programme published on the web..
The downloadable material mentioned is in fact an MS Word file. An accessible copy of the same material is now available here.
The material includes a chart which shows the process that is likely to be followed to achieve the objective:
The timing of the various stages outlined in this table is necessarily contingent on the outcome of Synod motions etc. At the time of writing in March 2005 stages A & B have passed and stage C is likely to be reached in July 2005. The House of Bishops expects that moving from D to P would take at least four years (not least because 18 months would need to be allowed for the referral to dioceses outlined in J & K).