Quick heads-up, The latest version of Belle v111.30.609 appeared under Nokia C6-01 (RM-601) over Navifirm.
The update shown above is still not available to download. As you know Nokia has already announced the date for Belle updated (Feb 2012) for Anna device users. But still some users are flashing their devices with the leaked version to get the test of new Nokia Belle UI.
Please do let us know if you succeed in download and flashing your C6-01 with this version of firmware.