what is the current block height of cloudcoin (and is there a block explorer)?
No block explorer yet, but it is planned. Are you wanting to check you're properly synced? Here's the current network state:
blocks : 464830
difficulty : 2.08437690
block 464830 hash = f521b23deb9c0e4167bf3eae072d5f6b049a0b047e350f1fe37d803f502c654b
(You can verify you have the same block hash by doing 'getblockhash 464830' from the debug console, or RPC commandline)
Perfect... we should be all synced and on the right chain.
You can get the pool's information here
http://mining.coreco.in (stratum+tcp://107.170.100.196)
Port 3030 - diff 8 (for small hash or CPU)
Port 3031 - VarDiff ranging from 32 ~ 512
Port 3032 - Diff 256
Port 3033 - Diff 1024