"ITMJ: You use a dual licensing approach for your business. One of the earliest dual licensing strategies I'm aware of was Peter Deutsch with Ghostscript. How is what you're doing different?
"Olson: Peter's doing version lagging, where the current version is available only under a proprietary license, and the open source version always lags one release behind. With Berkeley DB, the current release is always available under an open source license..."