Request: Can anyone give me any information about Sombrero?

Phil is on holiday, but he made one blog post before leaving that has been making me rock back and forth in my computer chair:

Project Manager of the Nokia (NYSE: NOK) Mobile Web Server project (aka
"Sombrero"), Juha Pusa, will be in attendance presenting the mobile
webserver. What is it? Why does it matter? What can you do with it? How
can you extend it? Etc..

I want this information. Badly.

I always knew the mobile web server as Raccoon, so when I see this random code name I never heard before I want to start asking questions.