Just released version 0.2.0 of OmniPITR. There is one important change – that is OmniPITR backup programs can now create checksum files for backups.

Details in docs, but the basic idea is that to all the other options to omnipitr-backup-{master,slave} we added (Phil Sorber to be exact) –digest option, which lets you specify that you want some checksums (md5, sha1, sha2).