In all of my trips to WDW, I have never seen Flora, Fauna or Merriwether. I don't even remember ever seeing them in a parade. I would post this question on the Themeparks board. You'll get a lot more traffic and I'm pretty sure someone over there will know if they are ever out.
We saw all three fairies in the MK parades- even Spectromagic. We did manage to get a photo of Merriweather as she posed with my DD3 as she walked past. But they are not available for meet and greets.
This was in March of '08 and Oct. of '07.
-Sarah
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