Today's layout changes are an indicator of other, bigger changes to come. Why? Because I only ever make layout changes when I'm working on other, bigger features. I'm not sure why, but it's true.
Anyway, you'll notice that the ads have moved, and you'll notice that the browse and search pages are a little different than before. I think of them as "cleaner".
I have some other, smaller layout changes in CVS, but I can't roll them out until the bigger changes are done. Watch for those changes, both large and small, next week sometime. If, in the meantime, you notice any problems with the new layout, please let me know.