I'd love to be able to have alerts that tell me when someone has posted about certain topics - you know, like a TV show, or the hospital where I gave birth, or DD's name so I can be nosy about what people think.
Maybe everyone else is more organised than me but I forget and don't do a search for ages and by then I've missed a thread I could have actually been helpful on (ok, I know that sounds smug but I do think sometimes on threads about things like a local hospital people could be really helpful).
Or is that too hard to do?