As more and more people sign onto Tangler, I suddenly realise that I need the ability to subscribe/unsubscribe at the Topic level, not just the group level.

My Your Stuff page has like 100+ new on it.

That's not useful information any longer.

Useful information would be that there are 1-2 new topics, and 10 new messages in topics I have expressed an interest in.

You could auto-subscribe to any topic by posting in that topic.

But you have to be able to forcefully unsubscribe to it, so that new messages in a topic you've ceased to care about no longer show in Your Stuff

With just 100 more users, I know I would be overwhelmed by Tangler's discussions

I asked dekrazee1 a similar question earlier, after I wanted to see quickly if anyone had replied to the topics I had posted on.  Maybe a list of topics in which you've posted in in the last 24/48 hours would be handy to quickly glance through?

that wuld be great!

and RSS subscriptions too 

In a similar vein (related to the increasing amount of stuff on Tangler) the scroll bars on some topics, and to a lesser extent some groups are becoming unweildy as moving it a short distance scrolls a whole lot of posts

Maybe some division into multiple pages? 

Yes! This behaviour really frustrates me too