You guys, it gets 30% ish harder every two weeks to mine, right? you will probably only make like 30 cents a day if your electricity is over 14c per kwh.
If you want to mine a crypto currency for fun, and want to make the most money you can, check this out. http://www.coinwarz.com/cryptocurrency
Also you can sell your 5870 very easily now because it is one of the best mh/w cards out there. And also for a lot more than you would expect.
Also start mining lottocoin. relatively easy to mine right now.