TrekNature has been mostly synced up to the other trek sites so now the Lists feature is available, which allows one to group photographers, critiquers and workshoppers together in one's private groups. Note the 'My Lists' section on the left hand section on every page.
A Scavenger Hunt feature has also been added, but there are currently no hunts. If there is enough interest one can be added at anytime.
Also, browsing genres etc should be quite a bit faster I believe.