The attached white paper is a great survey of M2M:
» M2M Market Trends and Usage Models» M2M Impact on the Enterprise» Kontron M2M Solutions» M2M Challenges, Technologies and Future Developments
Here are some additional resources if you're looking for more information on M2M and Intel Architecture solutions:
The Deutsche-Telekom M2M Toolkit
Intel's M2M Developer Site
What do you think of Intel's offerings in the M2M space?
We have very similar solution with WI-FI embedded Module.
Can you check www.damosys.com module named DS620P