How do I get "wget" for Snow Leopard?
Alternatively, if you don't need wget specifically, Snow Leopard does come with curl which does many of the same things. 

E.g., fetching your flair via wget:

wget http://apple.stackexchange.com/users/flair/2726.png


vs. fetching it with curl:

curl -O http://apple.stackexchange.com/users/flair/2726.png


Notably lacking from curl is wget's --mirror option, but it does have nifty fetching with patterns, which handles many of the same problems:

# Fetch flair images for users 2726 through 2730
curl -O http://apple.stackexchange.com/users/flair/[2726-2730].png