I actually spoke to a friend at Cellucity as a friend was wanting to upgrade to that as well. The Talk 100 packages, both BB and normal, the free minutes apply to calling Vodacom numbers only, cross network free minutes only apply to the Talk 120+
Thats the reason thats sucha good deal on such an expensive handset, the calls to other mobiles and landlines are billed at normal rates outside of your free minutes.
You can get it on the business topup for R459 with your R315 airtime per month or R429 on the Talk 120, also note the Talk 100 and Talk 120 are per minute billing, yet eh 120 is cross network free minutes.