Running some more fuzzing tests, I noticed a bug in the new getmininginfo information:

gavin$ ./bitcoind -datadir=testnet-box/3 getmininginfo
{
"blocks" : 218,
"currentblocksize" : 1000,
"currentblocktx" : 0,
"difficulty" : 0.12500000,
"errors" : "",
"generate" : true,
"genproclimit" : 1,
"hashespersec" : 0,
"pooledtx" : 18446744073709551613,
"testnet" : true
}

I think hashespersec should be greater than zero, also...