I have finally combed through my email and posted the first batch of votes, 66 in total.
Looks like we've got a most popular date: Thursday, May 2nd. More than 50% of people so far think the ice will go out during the 7 days from April 26th through May 2nd; and 90% think it will be out by at least May 3rd.
I heard from two Canoe Lakers who were up on Easter weekend (just 7 days ago!) and reported between 25" and 30" of solid ice; and it was something like -13°C on Tuesday night.
I'm going with May 8th, mostly for posterity ;-)