I don't know anything about the blackberry problem. You should contact our support team about that. Provide specific information we can use to test the connection to see what might be causing the problem.
The majority of the other recent email problems we have had (including the four hour delay on Friday) are related to our junk mail filters. The amount of email passing it through it has been increasing very quickly and has turned up some problems we did not encounter in our earlier beta testing period. We have already fixed a few problems and have added additional specific monitoring to the junk mail servers to detect problems. It is one of our highest priority projects at the moment. Email service is obviously very important.
Turning off our junk mail filters will bypass the majority of the email problems so you may want to do that if the timeliness of your email delivery is critical to you. We did have the service in testing for quite awhile before going 'live' with it, but the testing did not uncover all of the potential problems.
We are currently announcing another email delay we detected this morning so if you are missing some mail and are using our junk mail servers, it should be coming through soon.
We use our own junk mail filters on much of our own email and we are fully committed to continuing to work on it until it's working 100% of the time and is not delaying email. We're very sorry for any convenience or lost productivity and we are working very hard to ensure things run smoothly.