I posted an unsuccessful attempt of a tatted doily on my blog a while back. At the time I got tired of so much trying that I gave up. I went back to re-tat it and finally got something out of it :)
As you see the picots that connect the middle circle to the rest of the doily are a little too long :( but except that the rest looks good. I post the pattern here again in case you are interested. Just make sure your picots are not as long as mine ;)