I have set up the service
http://www.bitpools.com where people can pool their bitcoins to make purchases.
As I have not delved into the world of Bitcoin mining I am not sure of how people go about pooling for mining equipment.
I think it might be helpful though and I would like to add any features that would make it easier to facilitate hardware pools.
Please check out the How To section to see a full start to finish guide to setting up a Pool and let me know if it is a good fit for mining hardware purchases.
(note: there are no fees charged on the site so it would likely be similar to using this forum with a better interface)