A DigitalPoint Forums thread reports some advertisers are seeing minimum bids in their Google AdWords account as high as £55 or $100 US. Didn't AdWords drop the minimum bids with the new real time quality score? Yes, they did, but Google, as they said, did not remove that column from AdWords Editor or their API - just yet.
I have a screen capture of this in action, provided by AdWordsProfessional.com:
Pretty high those bids! Why are they showing? Well, as the real time quality score said, all keywords will be active now but most likely won't show if their quality score is very low. That is what you see with these keywords, I presume.
Forum discussion at DigitalPoint Forums.