I'm in a bit of a pickle. My company's website recently started ranking in the top 5 Google organic results for 80% of our 2 and 3 word "target" phrases, often #1. This has resulted in awesome e-commerce sales numbers.
The problem is that the site needs structural optimization badly after a designer carved it up with table layouts and 20-deep elements - I cry every time I look at or modify the source.
I'm afraid to heavily restructure the actual HTML into valid, minimal XHTML/CSS.
I would like some advice, thanks!