As far as i know that is correct. Two pilots with OML are not allowed to fly together under EASA rules which the local authorities can not supersede. Over here in germany that is not a change since it was handled that way before as well.
I have to do some research if that changes with EASA (we introduce it come april, not last one), however currently anyone with an OML entry is not allowed to instruct, train or check during actual flight since the applicant might not be a qualified pilot yet. Instruction in a simulator is fine though, however the LBA is of the opinion since no training can take place in flight the "highest" instructor rating anyone with OML can obtain is SFI.
For any multicrew operation OML is not a big issue, however single crew, instructing and getting employment without experience might a much more difficult issue.
Last edited by Denti; 18th Mar 2013 at 15:05.