Wow you must be rich now if you held onto those! How long ago where you mining at that rate?
Sure, eventually there will be 100 TH/s miners.
Yikes. We need to get said devices distributed widely then. Gone are the days of my laptop generating 50-200 bitcoins a day...
I got in about a week before a big difficulty jump. Blocks were being found rather fast. I mined for about a week, on and off. I generated ฿200 overnight once (which I still think is crazy...but I'm rather glad for it!
http://uofr.net/~bcg/a.jpg). I generated about ฿400 ish. I "wasted" almost $20 on bitcoin on bitcoinmarket.com buying around 200-ish btc. I've got more than half of it left, but, I sold a bunch in April. I'm lucky to have gotten what I've got for essentially nothing.
I mined because I believed in the idea of Bitcoin, not because it made sense economically. I'm glad I, and others, participated at various times to keep it going, even before there was a monetary value (in fiat). It's also good that there are many like me who pitched in for a short time, getting something to keep motivated to participate in the community, but not getting so much so as to ensure few people got anything.