I am DONE!! (for now, at least). I started mining on an ATI 5450 at 15mhs. I then added 3 more video cards and a couple of jalapeno preorders, then I added a handful of BE and red furies, for a total of 50 ghs.
Now I am watching my daily total fall to under .01 per day. It is depressing.

Sometimes I feel like I need to go back to playing warcraft. At least then when you got ganked you had someone to blame. But all in all, it's been very educational, and I am happy with the bitcoins I have earned. Sometimes I look at the hashing power I have now, and think if I had it 2 years ago, I would be a millionaire, but now it;s just sad to see the scraps I resign myself to making.
All in all, I have broken about even (not counting any residual value of the miners themselves), maybe ahead 1/2 coin or so at best. I think the learning was worth it, so I don;t feel cheated, just sad that there is no longer room for the little guys to be "productive"
I will probably get rid of my stuff before the summer, when the waste heat will be an added expense instead of a help to heat the house (I am in Michigan)
I can always come back in with more capable hardware at a later time, when the hash to $$$ ratio and the difficulty rises are less steep
Just so you know, a lot of people middle of 2013 unplugged because month-over-month they were "in the red". Had they kept their miners plugged in the entire year though they would have had less regret. Unplug if you wish, but just remember nobody knows what BTC will be priced at 12 months from now, and those small payouts could be worth $bank$...