Sounds like FOSS4G 2008 is going to have an even stronger proprietary flavor than the 2007 edition. Says Gavin Fleming:
FOSS4G 2008 is not just about open source – the whole SA GIS community will be there, including all the normal 'proprietary' GIS community. Content, exhibitors, sponsors (including GIMS) are from the open source AND the proprietary communities, not that there is a clear distinction, with many being from both. If you attended AfricaGIS in '05, or any GISSA or local GIS conference for that matter, FOSS4G is for you and is going to be bigger and better. It is indeed also the ‘GISSA 2008’ conference. Learn about how proprietary and FOSS GIS can work together. Or, learn about how to make the transition from proprietary to FOSS.
I think this is not a positive trend.