Are you brave enough to put your tea-making facilities in the DMZ? That's laying it on the line, man. Personally I think I would reverse proxy my teapot through nginx, I don't trust a TCP/IP stack embedded in a kitchen appliance.
I would like to take this opportunity to direct your attention towards the venerable http://nicecupofteaandasitdown.com which is both splendid and written by a hacker. I think you can tell when you get to the page with the venn diagram of biscuits.
The hypothetical Hot Beverages As A Service device that exists only in my head doesn't use NetBSD, it uses a custom standalone stack running on a PIC/AVR. So there.