The Summerlands (http://www.summerlands.com/)
Site represents an organization of the same name. Emphasizes Irish/Celtic culture. You can get more by registering. Recommended by Sandie. Includes link to the "C.E.L.T." Project which aims to put some original pagan-related texts online.

Llygedyn Grove (http://come.to/nemeton/)
A Druid Grove following a Celtic Spiritual Path. Their pantheon follows the Irish, Scotish and Welsh God/desses. Based in Round Rock, TX.