Here's a subtle variation I just saw in Google's results page:

http://blogoscoped.com/files/more/google-serp-20081010.png

They've removed the light blue background colour from the top bar and the band at the bottom of the page behind the second search box and options. Here's PREF ID and the JavaScript you can execute in your address bar to view it for yourself (remove line breaks first):

javascript:document.cookie="PREF=ID=8e1f9150bee471ed:
TM=1220385325:LM=1220388685:GM=1:S=33HsI5_LDgIcQa9G;
path=/; domain=.google.com";

It works.
and, IMHO, it's ugly ^^

I don't like it, reminds me of when they had a faint silver bar.