I made a site and joined adsense and was acceppted within 1 hour, even though I wasnt in Google.
I added my adsense ads in before launching my new site on accessible website design to the SEs.
That means Google guys must have okayed everything.
I was in Google, with a helpful link from one of my other sites, within 2 weeks, recieving traffic.
I was in yahoo within 1 week at the top 2 spots for my chosen keywords, the same with MSN.
As usual Google refers 70% of my traffic, and MSN second @ 10%. yahoo, p%sh as usual, accounts for 8%. Garbage.
That was 4 months ago - I'm waiting now on the forth coming Page Rank update to see how I've done, on PR anyway.
Traffics quite good though, with a decent conversion rate.