I have created a new cpu-miner 64bit and I achieved about 22% more khs/sec .
 
This version is based on cpu-miner-1.2c by ig0tik3d, and plus uses AES-NI/AVX instructions from an other library, so it's usable with this list of Intel Processors:

http://ark.intel.com/search/advanced/?AESTech=true

and with these series by AMD:
    AMD Bulldozer-based processors
    AMD Piledriver-based processors.
    AMD Jaguar-based processors.
    AMD Kaveri-based processors.

I'll release it today, but it's in alpha stage and needs testing because I tried it just with a Sandy Bridge i5-2400 from a friend.

I have not cpus to mine, so bounties for my time will are very appreciated.

Let me know if you are interested.

XCO: XxSJMTPKqRzADNe7Y3pazXF8jPV95EvDnS
BTC: 1Kwewq26emgePgvJFwcVCgzQTnxwdF1Jcb