Ignore IE6. And IE7 if it doesn't look entirely crap. I was fortunate to have my site just happen to look fine in IE7, but if it didn't I can't say that I would have cared. Microsoft doesn't care about following web standards, so there's no reason to care about hacking up sites to make them work with IE. When a majority of the web starts looking like crap on IE, people will switch faster than ever.