The driver Nokia have is binary only (and can't [are there possible ways around this...?] be released because it's a single binary, rather than a GPL-compatible wrapper + binary component), ImgTech don't release source.
...the organization that helps external developers getting contracts signed is Forum Nokia. Kate Alhola is the Maemo contact there and in fact she is interested and working in finding a way to get this puzzle sorted out in some way. ... If there is some volunteer from community that is willing to fix the driver, I [kate] can try to help get NDA or other reasonable terms for it...