For years I've used Backpacking Light and this forum. BPL more for technical discussions, and this forum more for discussion long distance hiking techniques. Unfortunately spam at BPL has grown worse over the past year, and much more so in the past week. It looks like the owner and administration there is completely unwilling to take even the most basic, free and effective steps to save their forum.
I know quite a few people here participate there too, and I suspect more people will sign up here as the fallout at BPL continues. While the primary purpose of Whiteblaze is for the AT, I hope it can accommodate BPL refugees as well.