Hi Anthony,
You could take a look at the SABRE Platform for i.MX6 family, which has two camera interfaces (and you could also order the cameras), multiple SD card slots, audio input and output, an optional GPS module/antenna, and there are some Wi-Fi SDIO modules for wireless connectivity:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RDIMX6SABREPLAT
There are other third-party low cost boards based on the i.MX6 families, like SABRE Lite, RiOTboard, Udoo and others. You could refer to the “Evaluation/Development Boards and Systems” menu of the “Software & Tools” tab of the i.MX6 Product Summary Page at the following link:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX6Q&fpsp=1&tab=Design_Tools_Tab
Hope this will be useful for you.
Best regards!
/Carlos
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