My observation has always been that the Realplayer desktop experience is a painful one. I got the codecs for WMP/VLC and I haven't looked back in years. Why would the N900 want to replicate that?

TBH, I haven't looked at this for a number of years, but if it's still half as bloated as it used to be, I wouldn't touch it with a 10 foot pole. Downloading flash is nice I guess, but you don't need realplayer to do that.