Look:
http://fibre.hashhot.com/index.php?page=statistics&action=pool

Pool Hash Rate   1,666.537 MH/s
Pool Efficiency   99.36%
Current Active Workers   51
Current Difficulty   112.56758298
Est. Next Difficulty   140.70947873 (Change in 1 Blocks)
Est. Avg. Time per Round (Network)   47 seconds
Est. Avg. Time per Round (Pool)   4 minutes 50 seconds
Est. Shares this Round   28,817 (done: 475.55%)
Next Network Block   3,845    (Current: 3,844)
Last Block Found   3,839
Time Since Last Block   23 minutes 31 seconds



Pool fee 1% with block finder have 1% bonuses


We need many miners....