There are probably many people who are not upgrading to the new firmware version. I am one of them.
Unfortunately, if you are holding off on upgrading to the new iOS (5.1.1) because you are waiting to see what happens in the jail breaking community, you will have to put up with any notifications, warnings, etc. - you know, nagging!
Just be extra careful and vigilant and don't blindly click on a dialog box. Ensure you read it (both on the iPad and in iTunes). Don't want to "accidentally" upgrade!
And, no, we've not heard whether its safe to move up to iOS 5.1.1. yet. However, just apply the jail breaker's general rule of thumb: Do not upgrade until there is a jail break or until you are told to by a prominent/respected member of the jail break community. We play a waiting game and usually are one firmware iteration behind.
Marilyn