Here's something I picked up from a cisco conference last year:
Upgrades for customers on traditional licensing:
This depends on whether your users already are running any one of the UC apps in the CUWL list (a CUWL app includes :- softphones / Unity VM / Presence / Mobility). You just choose your upgrade price from this list :-
Current User Moving to List price Introductory price
CUCM CUWL Std $150 $120
CUCM CUWL Pro $225 $175
CUCM + Any Application in CUWL CUWL Std $100 $80
CUCM + Any Application in CUWL CUWL Pro $175 $135
CUWL Std CUWL Pro $120 $120
+ the UCSS / support options.
HTH. If not, refer to your cisco partner.