yup...that's about right....
and not just for the n900...n800 too.
Haven't tried the n810 on win7 bluetooth yet.
But I imagine it will sum itself up the same.
On XP I don't believe I had a prob with bluetooth.
Best suggestion would be to use admin rights...compat settings and install proprietary drivers for xp or vista (vista may be more compat with win7 os...shouldn't be too bad tho. with xp drivers)
and jimmy the win 7 to see and utilize your n900 bluetooth.

I just finished working some mitey serious magic jimmying win7 onto my toshiba portege m200...the real stunt (as if installing without an optical...proper usb support of any compatible kind ...excepting very rare and old optical drives...sd card hurdles...or even ripping out the hard drive and attempting to install win 7 from a pata to a pata...rather PITA hehehee...shame on toshiba for making this so awkward and difficult...even to simply reinstall xp...but without suffering a brain aneurism from having to think..."durn you toshiba for having to make me use my brain!"...as I shake my fist....I laugh bout it now...but it was a challenge I must say ...and took me long enough to figure it out) was finding drivers to replace toshiba's m200 drivers which are ancient and xp tablet edition specific...hunted high and low and surprisingly hp sd card drivers...and many drivers if not for vista but as well for the portege m400 worked beautifully without any radioactive melting...or high pitched screaming and then exploding. Works like a dream ...in fact.
Faster ...better... smoother than xp tablet.
So if my frankendriver experiment worked I'm sure using a single compatible xp or vista driver to enable n900 to connect via bluetooth should be no prob.
When I get enough time I'll mess with the drivers on one of my laptops and get back with results.