Few hours ago I had no idea why so many were saying its too late to start mining. So I did some reading and calculating..
We are at the crucial point where it is still OK to start mining, but you will basically mine to get free hardware and maybe a cheeseburger. Before the end of this week difficulty factor will change again from current 567269 to something bigger. Before I did all this reading and calculations I had no idea difficulty factor is going mega crazy as of late. Here is a chart
http://bitcoin.sipa.be/speed-lin-ever.pngEvery 2016 blocks difficulty factor is recalculated and is going to increase more and more eventually to a point of breakeven with electricity cost and after that even more so we will be running with a loss hoping for Bitcoins to be worth a lot more in the future. It takes only approx 10 days for difficulty factor to change and it can change by a lot. Here are past few changes with dates and factors:
2011-04-30 109670
2011-05-09 157416
2011-05-18 244112
2011-05-26 434877
2011-06-06 567269
Next difficulty change will be at the block 131040 which you can monitor here
http://blockexplorer.com/ This thing might happen by Thursday of this week and my prediction is we are going up by 15 to 20% to about 660000. Before the end of the month we will get another move to 750000. Difficulty factor is going up so quick that it will soon be at electricity costs vs making Bitcoins. I know and understand there are other important factors to be considered but mining for a true newbie like myself is just not worth it any more.
To calculate your approx earnings you can use this calculator
http://www.alloscomp.com/bitcoin/calculator.php You can do approx calculations for every week if you are estimating the difficulty factor change. Keep in mind the difficulty factor changes every 10 or so days, so you are basically interested in a weekly earnings ONLY. Don't be fooled what it says you will be making per month because factor will change twice before the whole month is over.
Why did I do all this research ?
Personally I got money to burn and I wanted to go big with this. I could start with approx $75k of hardware and add about $10k per month, but after my research I'm 100% sure we missed the easy cash in this thing. Start of this year difficulty factor was around 15000 and it would be a sweet run if I picked it up then. I would run it all the way until I was breaking even with electricity costs with I'm predicting will occur next year depending on the base electricity price for an individual.
So what can a small scale newbie do ?
You can buy a fancy Radeon gpu and do the mining whenever computer is idle and I can guarantee you will eventually get your investment back plus a cheeseburger every once in a while. Which is not such a bad deal for all the gamers out there who couldn't afford high end card so far.
All of this is just my research and personal opinion on the matter.
Good luck to all the newbie miners out there.
skyhigh