A silly calculation. Based on http://blockexplorer.com/q/nethash - I make the difficulty at the time of release about 600, rising to 1200 a month later. http://www.alloscomp.com/bitcoin/calculator At current prices - if you had started bitcoind when the original release was posted in this thread on your n900, and then left it running for about 3 months, you would have around 3 bitcoins likely by now, worth about $3000.