I've been using Talcum Powder (Baby powder) for the first 20-30 pulls or maybe longer, using the silicons natural oils and the talcum for the release.
When it starts to "hang" more, I have in the past used Locktite's FreKote (SP, I'll have to look at a can), and just tried for the first time this last week the poly ease. I must say, so far I'm a BIG fan, the poly ease is much drier going on and seems to release better with less apparent texture than the Frekote. It IS a bit pricey, at around $10 a can though, but so far I'm impressed.
Whatever you do, if you go with talc, fine, stick with it until you have to go to a release spray, then use ONLY that release for the life of the mold, don't switch to another or try and go back to the talc, you'll probably be VERY sorry you did, as your mold will more than likely be KAPUT.
Ryan