I really don't know about online resources. A lot of the 3rd party companies who made stuff under 3.5 shifted to making their own games (Green Ronin for instance).
There's KoboldQuarterly.com, but I don't know if they're going to be moving towards Pathfinder now that the rules are out.
There's KoboldQuarterly.com, but I don't know if they're going to be moving towards Pathfinder now that the rules are out.