Wow.. don't everyone answer at once!
Well.. First i made a good sum from Adsense Firefox referrals.. so much that Google posted about it here: Adsense Success Stories
Then, I wrote an ebook that sold around 1,000 copies @ $10/each (but, it's free now, HERE)
Then, I generated around $80k or so (kinda lost count) from Premium Membership sales..
all in all, i've generated around $300k since I started in 2006..