The following post is from Katie of Kitchen Stewardship : .., I've been thinking again about the safety of silicone bakeware.
it’s time to officially revisit that issue: Is silicone bakeware safe? Can it leach into the food or offgas into the air?
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I take three issues into account when making purchases for the kitchen: Is it safe for my family? Is it safe for the planet? Does it make the act of making food easier or tastier?..

Read more here

Good info here. makes me think.. so what do you say is silicone really safe for baking or in the microwave?