I'm not sure if this is a sensible idea or not (or if you already do and I just didn't see it when I looked), but possibly add a link on the front page (or "pin" several cardsets on "recent changes" if that's where people browse the most, or something).

It might be useful for newcomers (to say "if you just want to test the controls, go here" and "if you want to make a couple of cards individually and talk about them, go here") and for regulars to have a convenient link to commonly used places.

(Or a more complicated version would be to give people a customisable homepage, or something, but I think a standard list is probably both easier and more useful.)

I like this idea. Before I had enough projects in work and enough cards to make it worth while, I would spend some time looking for the general cardset. I also got it mixed up with other sets (like Link's).

That's a very sensible idea. Now that the front page is quick to load, it'd be very sensible to use it as a springboard of quick links to special cardsets. I could also provide links to the signed-in user's cardsets. If I link directly to each of those sets' recent activity and "create a new card" pages, it could end up a really useful quick shortcuts page.

Cards With No Home
Silver bordered
Testy
Multiverse Design Challenge
Feedback Repository
Community Set