Have to say the Bing Search App and Bing Maps for the 9900 is really impressive. I have never been a Bing fan, always have used the Google apps. No more for me. Google hasn't really put much into their Blackberry apps in quite a while.
If you haven't tried these they are easy to use, fast, nice interface. Nicely done!
I usually use Bing for quick searches when using Universal Search. It's nice. I prefer google as a web search client, but the Bing integration on the BB is great. BB Maps (Bing) is actually very nice. I still use google maps, but they are both pretty good.
I just hate Bing being forced onto my Berry with every OS upgrade I so. So the very 1st thing I do, is disable it.
Prefer google, although they might be a bit slow in the development department for our fave Berry devices.... give me a choice and I might try it.
