aaronngray.lists:

>    I was wondering if anyone had an idea or estimate as to how large the
>    Haskell community is ?

No one knows. There are many figures that you could use to estimate the
size (e.g. I try to gather signifcant stats in yearly reports about
Hackage)

 * In 2010, for example, 138,000 unique IPs downloaded the Haskell Platform.

   http://www.galois.com/~dons/talks/hiw-hackage-y2.pdf