Hi!
We found a fix for sending SMSes with Emoji for N9, which might work on N900 too.
I proposed an alternative fix for N9 (http://talk.maemo.org/showpost.php?p...3&postcount=42), which, to my surprise, also fixed the problem with sending SMSes with Emoji characters (http://talk.maemo.org/showpost.php?p...0&postcount=56). The same fix (replacing UCS-2 with UTF16 directly in libsms-utils) might also fix the problem on N900 too (I don't have N900, so I can't try).