http://www.onlineqatar.com/info/visa-ban.aspx in this link it said that there had been talks about changing the 2 yr. ban into a 6months ban.. 

but in this one http://www.onlineqatar.com/living/employment-contract.aspx it said today contracts are open-ended, and have few clauses to protect employer, such as the six-month ban period prior to granting new work visa for a particular worker. This implies that the worker should leave the country for six months before re-applying for a visa.

 

so if it's true that the 2yr. visa ban is now changed into 6mos. well that is a very good news.. :)