This, basically.
Modern javascript frameworks (jQuery, prototype, etc) have done wonders for getting code working in lots of browsers at once.
The biggest problem I have now is the fact that any sort of rich UI behaviour runs amazingly slowly. IE7 is bad. IE6 is worse. IE8 is buggy, half finished, and really no better than IE7.
The worst thing is that I don't think we'll ever be free of IE6. It was so ubiquitous, and so damn quirky. Loads of 'enterprise' (and by that I mean big web apps made by one big company for another big company) applications used highly specific IE6 javascript that doesn't even work in IE7, never mind anything else.
Companies can't afford to completely replace these apps - we're trying to sell them new ones and that means IE6 support is mandatory. The way it is right now, with credit-crunched companies cutting costs, I reckon we'll still be supporting IE6 in 2015 :-(
