The block explorer seems down - http://blockexplorer.coinworld.us/chain/AlphaCoin/

Is there a new one?

Already exist, and in the thread. It appears to be down right now, it happens from time to time as it is hosted via a third party.

http://blockexplorer.coinworld.us/chain/AlphaCoin/q
etc. replacing AlphaCoin with coin name.

I ran the miner overnight. Here are the miner's stats as of this morning.

[2013-07-20 08:25:36] Pool: http://coinworld.us:8884/
[2013-07-20 08:25:36] SOLVED 16 BLOCKS!
[2013-07-20 08:25:36]  Share submissions: 34172
[2013-07-20 08:25:36]  Accepted shares: 21492
[2013-07-20 08:25:36]  Rejected shares: 12680
[2013-07-20 08:25:36]  Accepted difficulty shares: 202557
[2013-07-20 08:25:36]  Rejected difficulty shares: 120888
[2013-07-20 08:25:37]  Reject ratio: 37.1%
[2013-07-20 08:25:37]  Stale submissions discarded due to new blocks: 301
[2013-07-20 08:25:37]  Unable to get work from server occasions: 2
[2013-07-20 08:25:37]  Submitting work remotely delay occasions: 1

Even though the rejection rate is high, the results are good.

I have a miner doing load balance mining between coinworld.us and nanotokens.miningpool.co.  Coinworld offers more lower difficulty blocks (1 and 2) and rejects about half of what the miner submits.  The second pool offered blocks at 32 difficulty and so far has not rejected any.  Less blocks are submitted with the higher difficulty (as expected.)

I see a 49.5% reject rate after ten minutes of mining.
On the positive side, I did solve three blocks (but at least one solved block was rejected.)
I'll run against another pool later to see what reject rate I get there.