Both Hitwise and comScore released their search marketing share reports this past week. Both showed Bing growing and Google not from the previous month, in fact, Google has lost share for the "fourth straight month" according to Hitwise.
Here is the Hitwise breakdown:
Here is the comScore:
Yea, Google still has a dominate lead, but it does look like Bing is chipping away slowly and slowly.
Forum discussion at (the very pro Bing forum) WebmasterWorld.