This past weeks issues was with BIS but the most recent was with BES. At least they are admitting an outage.

But this is typical of RIM - Blackberry not to admit faults especially when data loss can occur.

Certain versions of their software lose calendar items and when they fix such an issue and put the fix in an update it will say something vague like fixes calendar issue with no more details.

is doing the same thing over and over and expecting different results. Try something new, other phones out there allow you to use your own mail service (gmail, yahoo, etc or your own isp/mail server). This "push technology" isn't limited to rim.