For those of you whose understanding or use of the Greek letter lambda is related to physics, biology, ecology, criminology or some other scientific field, here's an additional use which pertains to this cartoon:
According to Wikipedia, "The lambda was selected as a symbol by the Gay Activists Alliance of New York in 1970, and declared the international symbol for gay and lesbian rights by the International Gay Rights Congress in Edinburgh, Scotland, in 1974." And thus, it is not uncommon to find it in the names of gay conferences, businesses, etc. And, ironically, for those of you who are Anglican, it means that the name of the conference in the cartoon is quite close to the Lambeth Conference where bishops of the Anglican Communion are convened by the Archbishop of Canterbury.
p.s. this is not pastor stickman. Note the conference sign, the stand is at the side instead of at the center (though pastor stickman may occasionally have the stand at the side if he's using powerpoint), and there are no steps up to the stage