Several - i just joined the Slime Mold Collective - facebook has the mycological society of ny - and reddit is also forthcoming. Often the gaps in my knowledge turn into edits subsequent to posting - thats what happened last two posts actually - tworeddit users who know a ton about slime molds told me where i was wrong and that resulted in a ton of edits.

I expect a similar thing to happen here in the next couple of days :)

Having some comment issues - sorry - i meant to add that these other resources are available when the books and online resources fail to completely edify.