The Anglican Church in Nigeria has been very supportive of this legislation, and I have now heard from two independent sources that the bill was spearheaded by Archbishop Akinola, the Primate of the Church of Nigeria (Anglican), following the emergence of Changing Attitude Nigeria, an organization dedicated to getting the Anglican Communion to accept their presence within the Church (hardly an affair into which the Nigerian government ought to insert itself). The Church of Nigeria, mirroring the sentiment of many Africans, believes that homosexuals do not exist in their midst. (See this by Colin Coward of Changing Attitude UK.)
According to an email I received from Dorothy Aken'Ova, a board member of INCRESE, the International Center for Reproductive Health and Sexual Rights, in Lagos, Nigeria, the bill is most definitely not dead [emphasis mine]:
We can do more than hope. To conservative Anglicans out there, I ask whether you think that Akinola's endorsement of legislation that would let ministry to gay and lesbian Nigerians turn to persecution is a good idea. It is your voice, and yours alone, that would ever have a chance of getting Archbishop Akinola to change his position. You're running out of time.The bill is at the comittee for human rights for any modifications. We anticipate that the bill may be presented for public hearing in July and then any amendments made and submitted for passing. ...Since we had the strategic dialogue, we agreed to meet with the Chair of the committee. We are working out an appointment to that effect. He has also called on three other committees to deliberate on the bill with him, so we shall make an effort to see the members and chairs of these committees individually before meeting with them as a group.
We are hopeful that we shall succeeed in achieving a change however little.