May 24, 2011
No maps app inside this rom... prefer the contact can sync to Facebook by joining contact n Also Calender sync

Sent from my GT-I9000 using the miuiandroid.com forum app
As far as I know everything on your checklist can be fixed, if you haven't fixed it already.

Maps can be downloaded from android market or market.android.com.
My contact-sync is working flawlessly with facebook. Are you sure you have automatic sync turned on? Maybe try reinstalling the app.
Same with calendar, it works. Try reinstalling the latest ROM and english pack.

And just so you know, people tend to be more helpful if you write because you need help, not because you're complaining.
Words of advice, my young padawan.