I don't know what crunch the Pathfinder Chronicles Campaign Setting book will have for Irori, but the cleric/monk combination is something that begs for development. Unfortunately, there's not a lot of material in 3.x (the Sacred Fist PrC in Defenders of the Faith and Complete Divine was kind of meh, the Initiate of Pistis Sophia PrC in Book of Exalted Deeds didn't improve spellcasting, etc.). Below is a feat I developed to meet this need.
Disciple of Irori
Your studies of the teachings of the Master of Masters has allowed you to improve both your ability to channel divine power and fight unarmed.
Prerequisites: Improved Unarmed Strike, Turn/Rebuke Undead, must worship Irori
Benefit: Your cleric and monk levels stack for determining your unarmed damage, your Turn/Rebuke Undead ability, and your cleric domain powers. In addition, you can multiclass freely between the cleric and monk classes. You must remain lawful to continue advancing as a monk. You still take all applicable multiclassing penalties.