Since this has turned into a discussion on Tangler;

I use Tangler occasionally (I'm Sydney based, so I've met Martin too - great guy, very helpful). The app was kinda slow initially, but it's getting much better. I read posts on it a couple of times a week now, although I don't necessarily prefer it to traditional forum systems. It seems unfocused at the moment, but I suspect that's largely part of their plan to let the users decide where to take the app.

I do agree with bootload that they need to get rid of the second click through layer for topics. That does bug me a bit. Some better visualisation of topics within groups might help too - I feel lost without hierarchical navigation.