Hi Nick,
To be fully honest we are exploring a number of options. Here are the options on the table:
1. Continue to offer AGPL-licensed Social Office 2.0 CE based on Liferay Portal 6.1 CE (1.5b model)
2. Freemium model with Social Office 2.0 that works on Liferay Portal 6.1 CE or EE. Limited to x sites or y users; unlimited Social Office 2.0 available for EE
3. EE-only Social Office 2.0
Separately from these options, we will pursue a SaaS-based Social Office. with flexible pricing options and possibly some free options.
There are a number of factors we are considering:
1. We have not seen strong open source community develop around SO—we suspect this is due to the nature of the product—it's more of a finished product than a developer platform
2. There is added complexity to developing SO for both CE and EE—part of the reason why we went EE-only for 1.6. We got to a point where SO 1.6 was so dependent on Liferay Portal 6.0 EE that we couldn't do otherwise
3. We don't hear a strong sentiment of people wanting to heavily customize Social Office, so source code access is less important.
4. The more we can drive sales of Liferay Portal EE (e.g. by having SO as an EE-only bonus), the more we can invest in the further development of Liferay overall.
Of course we also have to consider that we have indicated that we would have an open source version of Social Office 2.0. The choices here are:
1. Go with open source after all
2. Reward our community members that have been involved with SO or waiting for it with a complimentary license to Social Office EE or SaaS instance (we would determine this by looking at the Forum history)
OK, let the tomato-throwing begin.

I welcome your thoughts.
Bryan