There is a 3rd party tool called Lotus EasySync that can sync your PAB with Lotus Notes.
I developed an application for a German customer who is using Lotus Domino too.This application should be accesed through Services button on IP Phone This application queries Domino directory or Notes Personal Address Book via WebServices and displays results on IP phone. You can find a User Manual in german on my website http://www.arsnet.eu/workshop/iBOS20-Cisco-DE-pptA4.pdf . I can develop this Application in English too.
Has anyone installed the Lotus synch application? do you just need to inform it of the url for PAB and log, password? Is there any issues with CCM vesions?
I have not installed the Lotus synch because this Apps need Time for synchronisation. With my Web Services you have a Real Time access to Lotus Notes PAB informations independent from CCM version. The Telephone can communicate "directly" whith Personal Address Book via XML-RPC, see the image under http://www.arsnet.eu/img/iBOS20-Cisco-xing.jpg