Yes, I have attended one conference named 'search Camp 2008' held at Mumbai (India). I had a wonderful time thereby sharing the SEO ideas with many webmasters. I got to know many of useful things which i did not know earlier.
Yes, I've also attended one more conference in 2010 named 'Search Marketing' at Bandra, Mumbai. I got a chance to meet the SEO gurus and I also found few of big digital marketing companies employees. I got a superb experience over there.