We don't have any module partners using that series. Do you think it is powerful enough?
Umm.... the sn8000 from murata is just the chip on a module along with certification. Are you implying that F103 series will not get driver support?
The BCRM43362 inside muRata sn8000ufl support both SDIO and SPI host interfaces. From the datasheet: "GPIO_0 is initially used as a strapping option to select between SDIO and SPI modes". The SN8000UFL routes the GPIO0 if WLAN to outside.
By default the WICED sets the host interface as SDIO and it could be changed to SPI. On Wiced SDK, use the -SPI in Make Target command to build your application with SPI host interface.
Here is an example of scan application build with SPI host interface:
snip.scan-SN8000xUFL-SPI-debug download run