The sites I manage suffer from the same characteristic. IMHO people manage to find their way to a site, perhaps register, poke around a little, then meander off. A few bookmark it in an obscure folder (like "interesting sites") where the link is lost, but most don't even do that.

I'm not sure it would help, but after the registration page perhaps some pursuasive BOOKMARK ME NOW and ADD ME TO YOUR NAV BAR (all the most pious monks do!) might help get the numbers up a bit? I suspect people would return if they could remember where this page was!

In fact, I just stumbled on *my* bookmark today and returned after a long absence where I didn't remember this site was here.

tuxxe