While I normally rely on IE for my MOSS/SharePoint editing interactions, as of late I'm making the switch to Chrome in that space as well. What I've found to date has blown my mind.
Yes the MOSS 2007 UI degrades somewhat but it's still very useable. More importantly, Chrome drastically reduces the time it takes to accomplish basic tasks like modifying page content or viewing list data. I'm not saying these are normally slow in SharePoint but they can be in the www.westernaustralia.com environment (it's an ageing site with a lot of content and a lot of customisations); some pages in particular nearly grind to a halt in IE8 with the corresponding process consuming upwards of 1GB of memory the more I interact with the page.
Chrome "fixes" many of these slowdowns I'd previously attributed to the SharePoint environment and gives me all the Chrome goodness I've come to love over the last two years. It almost makes the SharePoint editing experience pleasurable!