just got off motorola chat support:
brett: i have heard conflicting reports regarding bionic software version 5.5.893, 5.9.901 and 5.9.902...which is the latest, official version to be running
Andrew: The one with the 901 on it, there's no 902.
brett: 5.9.901 is the latest official version
Andrew: Yes, that is correct.
brett: i have 5.5.893 and when i check for updates it states there are none available
Andrew: The 901 is still in the process. Not yet complete. Can you give me your phone number we will keep you posted if we have all the information in the system.
brett: so 901 is the latest official version but has not been released to the public officially?
brett: so i am correct and up to date in having 5.5.893 installed?
Andrew: Yes, you have the up to date software, I will check when will be the full deployment of the 901 so that we can let you know, also give me the MEID# of the phone.
brett: you will check now and let me know now?
Andrew: I will need to forward the report of yours, sorry I don't have the information here in the system, we will check back with you about it, is this your good email address here as well?