The only pool that has been up this entire launch 250+MH/s
http://i.imgur.com/HiV0n8k.png
http://i.imgur.com/1oziSmq.png

http://lemon.stablehash.com/

Features:

48GB DDR3 ram + Xenon 4/8 core processor
2TB HDD + RAM memcache
160 Gbps DDoS mitigation
99+% efficiency
99+% uptime
PROP 1% fee
VARDIFF
Commitment to uptime and stability
IRC chat