For those of you who are active in the IRC channel #esp8266 (on Freenode), since yesterday we have a bot. It's not that useful yet, the most interesting thing it can do is tell you how long it's been since some user is active (esp8266bot: seen Sprite_tm).
Anyway, that's still pretty good if you consider that the bot is completely in the style of the channel:
That's a 5V USB power plug which feeds into a LM1117-3.3 which powers the ESP8266. The only extra component is an 100uF cap to suppress transient spikes.
I'll publish sources as soon as I cleaned them up a bit.