Yes, this is the only Official MIUI released.
XDA-developers only mirrored its release by its fans. So it is a bit outdated from orig MIUI.
The correct way to flash MIUI belows.
Requirement:
1. G.O.T v2.2.1 leaked rom.
2. OpenRecovery v1.46/ Androidini OR v3.3(based ORv1.46)
3. RSDLite v4.6
4. Motorola USB Driver for Windows x86/x64 (x86/x64 seperated version depends your Windows, currently v4.9)
Steps: (Backup your data/ sync to Gmail and be sure enough battery charged before upgrade, all data in phone will be wiped. Software Backup you could use Titanium Backup)
1. Install USB Driver and RSDLite.
2. extract OR files to your SD root, and copy MIUI .zip files to \\SDCard\OpenRecover\Updates\ after that.
3. Power off your phone. hold ↑ + POWER to load into Bootloader.
4. connect phone to your PC USB, wait until driver installed correctly.
5. Open RSDLite, should see the device connected. Start Flash with G.O.T. v2.2.1 rom as base rom. Patient to wait until finish Flashed and phone finish reboot and able to enter Android, that's G.O.T v2.2.1. RSDLite would show "PASS".
6. Power off your phone, hold "x" + POWER until saw "M" logo, then pressed VOLUME UP + Camera, you will see △ and able to load OR now.
7. choose "2. Apply SD updates".
8. goto "Apply updates" and now choose the MIUI .zip files. Until it shows "SD Installation completed", wipe Dalvin-cache if you wish.
Then Walla, you are now on MIUI.....

But still in Chinese.
go
http://www.miui-dev.com/roms/ to download the English Pack file.
copy the Language Pack .zip file to \\SDcard\OpenRecovery\updates too
Again boot your phone to OR(refer step 6 above). "Apply Updates" again.
This time choose the Language Pack and install.
Walla... Now your MIUI in English already.
Good luck for those who successfully applied.

Always the latest MIUI from MIUI sites.
31/3 will release v2.3.3 based on CM7_2.3.3.
And today, China XT702 already released Official OTA v2.3.3 FYI.
Dude...this not milestone daaa...xt cannot flash g.o.t....wrong advice..
for those want to play games with v2 , you need to open any video with stock player 1st and display out to TV..once movie start you need to double tab home button then your home screen will appear on TV..now you can start play the games...but if u want back to normal display then u need to reboot from TV display ..if not u need to pull out the battery to restart..