If I had the secret to finding Flex Developers; I'd bottle it and sell it to recruiters for a half million each. :ha, ha:
If you have defined requirements and are looking for a remotee developer on a fixed fee basis; feel free to contact us: http://www.dot-com-it.com/contacti.cfm or give me [Jeffry] a call at 203-379-0773
Beyond that. There is a Flex Jobs Yahoo group; but I think it is moderated so posts only go through routinely. I've seen peopel post here and to the Flex Coders group. You could also try looking for local Adobe / Flex user groups. Many have job boards or you could network locally by just showing up to a meeting or two/.