It's being done : http://gitorious.org/gnote/mainline

Although i'd say this is going backwards. Improving Mono/TomBoy memory consumption feels more like the solution here, even if it's a bigger job

Just consider it a preloader for your other Mono apps. Once you go to launch Banshee, all those dll's are already mapped and ready to go! And hey, it happens to take notes, too!