5:55 PM -- Its hot in NYC today -- really, really hot. So hot that it feels like you are walking into something solid when you leave the air-conditioned confines of the AT&T Building.

Up here on the 21st floor we get regular warnings about the need to conserve energy in order to prevent blackouts. Turn off lights you are not using, make sure you fry any eggs on your stomach rather than using the griddle, etc.

But, of course, we all have our cellphones, pagers, PDAs, and MP3 players in the office and they regularly get charged up. This got me wondering -- has anyone yet come up with a suitable design for a solar cellphone?

I've seen solar WiFi access points designed for use in the harsh climate of the Sahara and where have you. I don't, however, recall seeing a solar cellphone although I'm sure they must exist somewhere -- even if only in prototype form.

Or maybe the sun has just got to me and its a crazy idea. You know what they say about mad dogs and Englishmen.

— Dan Jones, Site Editor, Unstrung