Java Identity Provider

[Grant Noles]

Hi,
I'm trying to test out OpenID and build a Java Identity Provider, but
I'm not sure where to start.  I've looked at the Java libraries from
IDPrism and Netmesh, but there doesn't seem to be much documentation
for either.  The IDPrism site looks like it hasn't been updated in a
year, so I'm not sure how current their library is.
Has anyone built an identity provider using either of those libraries?