5gh/s won't earn you much at all, sorry to be the bearer of bad news.. difficulty is now over 2billion.
and yup, even 100gh is a far cry from what it used to be. I now find myself constantly adding miners to my rigs, just to keep a + equity.
I watched ebay over xmas and into the new year... couldn't believe it! all the hype around bitcoin mining really brought out some unrational thinking, did it not?
If you seriously want to make money with mining - 1TH/s hashing NOW, and you'll be shutting it down (or selling it on ebay) around April.
If however, you want to keep your little 5gh going.. get over to bitparking, merge mining will give you bitcoin (not much), namecoin and devcoin - and a couple others, which I leave to donate to the pool...
best luck.
If you do the numbers adding to your pool with 110nm, 55nm, or 28nm rigs doesn't make sense as you will never be able to reclaim the money you bought the older hardware for.
never say never
my rigs are currently still making profit (anything over the cost of my electricity to me, I see as profit.)
I've invested in the network, not in returns, so in my way of thinking, I have assets, even if those assets will become eventual negative equity. It happens to us all, like old age.
What the OP was asking, was about making money. I'm turning over beer money and i'm happy with that. I'm not making money and I don't expect ever to do so. I want bitcoin to succeed, and I'm part of that line of thinking.
