Tweaking the N900 Flash Version will let pages such as youtube or facebook to feel that the agent accessing them has the latest Flash Version even though Maemo has not been updated with Flash v10+ (Not that i know off). Once i tweaked the version on my N900 even Facebook videos worked with my browser!
Feature:
Tweakflashver alters the Flash plugin so that it reports a custom version to sites. This will NOT magically give you functionality not already in the plugin, but will allow to use sites that ‘require Flash 10’ even though the actual content works with Flash 9.
Screenshot:

You can download ‘Tweak Flash Version’ from your N900 Application Manager or by clicking the image above.
As most N900 users would already know that their phone has the best mobile browser to date, accessing all flash contents on most of the websites is an added advantage. The pleasure of browsing rich media content is amazing!