This is a frequent question...
The popular wisdom, as I interpret it, says that:
- Flash is a proprietary software, owned by Adobe
- The MeeGo distribution includes only free/open source software

therefore, chances of Flash being included in the firmware images are slim, slim, slim.

There is no technological impediment to have flash 10 running on MeeGo or Maemo, it is simply impractical form the commercial point of view.

As a rule of thumb, with regards with N900... if it is not open source, chances of porting are slim.

So if you really need flash support, or patented codecs... MeeGo is a dead end for you.

I personally do not care. Open source is the way forward anyway.