There is a nice feature on the forums.odforce.net, to follow whole section of the forum (Houdini Lounge, Technical Discussion, Solaris, ...)
I like the "An email when new content is posted" the most. It helped me to be active there, and answer to some questions. Now, this forum is more active, but somehow I miss that feature to have "passive", pushed, notifications about new questions. Only those first posts in a Topic, not the replies (I can subscribe to Topic).
I tried to setup few mobile RSS apps in said manner, but I am not able to replicate the odforce's way. Do you know any app which could do that, please? It can be paid.