Springer just announced that all their current titles can now be bought through the Google Ebookstore. The 52k titles are a mix of PDFs from titles published after 2006, and OCRed texts from titles published before 2006.
Springer ebooks are available in the Kindle Store, and they will soon be available at B&N, Kobo, iBooks, and the Entourage Edge store. They're also promising that they will soon start providing Epubs to Amazon for the Kindle.
“Springer has a device-neutral view with respect to eReaders and will work with partners who can bring our content closer to the end-users,” said Ray Colón, Director eProduct Management, Springer. “A large percentage of Springer content is image, equation, and table based and used in education and research so the user experience is crucial to our end customer. We look forward to working with partners who can bring us closer to our end-users via their devices and platforms.”