comScore has released their search market share rankings for October 2009 and the news is good for both Google and Bing - they both gained 0.5% in search share. This came at the expense of Yahoo! who lost 0.8% and AOL, which lost 0.1%. Ask.com stayed steady.
After experiencing a slowdown in the rate of growth in September, Bing is back on the momentum it was gaining since launch last June. Bing has now gained 1.9% share since launch.
At first, Bing's growth came at Google's expense. As of this new report, Google has recouped all losses, while Bing keeps growing.
This is mostly problematic for Microsoft's partnership with Yahoo! They're stealing share from a competitor set to become a partner.
Still, Microsoft has to be thrilled with the headway they're making with Bing.