Library consortia around the nation are starting to boycott HarperCollins because of the 26-loan restriction on e-book lending. The consortia have voted to boycott HarperCollins until there is a change in policy or price. Adding to the hassle would be the need to track each e-book, modify the catalog when the title had reached the 26-loan mark, and then re-modify the catalog when a new copy of the e-book was purchased.
As of today, the boycott of HarperCollins is still on and you can read more about the pressure consortia are adding in the Library Journal article here.