I do not believe it is possible for you to move the server objects (SSIS packages, customized jobs, etc) but you may re-create those (prior migration) and test. Actually, I am assuming you will test the migration anyway.

But yes, the databases can be migrated quickly using Mirroring.

I did it recently with several big databases and found no issues and it was to move from SQL2005 to SQL2008. The key is, ensure you have the same users on the other servers and you already reset the SSID. Once done, it takes a few seconds.