The secret to making money with adsense is NOT making a crappy site. Dont try to build a site for the sole purpose of slappin ads on it. Dont make a site about something stupid like medicine or lawyers. Make a site about something you actually care about enough to update it daily. You cant build a fan base for a site about mesophilioma or w/e the hell its called.
Mine is at a max of 36. Average now is around 15-20/day. Still working on it and increasing month after month. Need to work hard to get more. Only started to put in effort for the last 5 months. Before that is 2-3 months makes only 5-6.
Oh a lot of methods and some that are a little shady - hence why I am concerned about being paid, in saying that though I have used these methods for a few months, I have a lot of sites, blogs and proxies - I wasn't concerned when I was only getting $60 - $70 a day, but having a day that got $252 (for the record) may make the alarm bells ring with the Big G , I have had the same amount of traffic - I just changed some pages and attracted some better ad's.
Hit my high of $40 once. Now that I don't rely solely on Adsense (stupid rookie move, by the way), I'm consistently hitting over that mark.
Highest earning for my best site was 93.97 in May 2007 - I still look forward to breaking the 100 USD limit Last 14 days had a avg. of 56 USD, so it's not that bad.
Most i've earnt is around $2.50 which is crap but it's better than nothing. Not really focusing on earning much at the moment as i'd rather work on quality but soon enough i'll try whatever I can to improve it. A decent goal though would be $5-10 a day so it can pay for the server and allow for future investment for a better server for my site(s). Anything above that and i'll be over the moon! I'm sure alot of people who are earning that much do their work on their sites as a hobby and in their free time.