Was it about the same as the latest CPU-miner? CPU-Miner seems to get around 1~2 MH/S per core.
I am wondering this, because the average network hashing rate for the first year of bitcoin's existence was around 5MHash/S. That would mean there were on average, only 5 nodes in the bitcoin network the first year.
Also, when did the client start supporting external miners?
The difficulty stayed at 1 the whole first year (2009), because there were only a handful of nodes on the network. In other words, at 2 MH/Sec, you could have mined almost 700,000 bitcoins the first year with just a middle of the road dual-core CPU.
Which would be worth around $10 million now.
Read it and weep