i read to page 5 then skippped the rest , since it was getting kinda repeating ...
one issue maybe missed by many , is the BT , the device seems to refuse to connect to many BT headsets . i had a nokia BT ( dont remmeber model ) it was working with my N82 , i checked the nokia site for combatibelity and it was listed as cobitable with the N900 but it refused to work . i got a samsung stereo bt headset and it works just fine .
the issues refering to the phone app , call log and mms support , where kinda " known " cause the n900 was oriented more toward a Tablet with phone call support . althought im not 100% satisfide with the phone features and there is a lot o potential for improvments , the thing that annoise me is the " small screen " , i love the flash support etc but the screens doent help in that section.
as for the mp3 tags etc , it is nice to have the tags shown etc but its not a major thing ..