Well, if we don't see a replacement by late summer or autumn sometime, I'll assume it's dead. But the thing about camera announcements is that sometimes they leak rumors way in advance, and sometimes barely at all. I think the first rumors of the A were about a week before the official announcement which was about two weeks before it was available. I bought a backup of the original and would probably wait quite a while before buying a replacement, if I would at all - I have trouble envisioning it being much better in ways that would matter to me. But I don't think we know yet whether there's another one coming.
Ricoh is behind it's usual 2 year update cycle for the GR also - or at least right up against it (we had rumors in March, announcement in April, and it hit the stores in May) - and no word of a new GR either. But nobody seems convinced it's dead. Occasional rumors of new versions of both, both with 24mp sensors and not many other details. But nothing detailed enough to really believe. Just enough to make you wonder.
I personally won't be surprised either way...
-Ray