Very good idea, but I'd say that if the thread isn't kept alive across the month then people will forget about it.
From PotW I know that by Thursday and Friday, even though people can still enter, we seem to get a lot fewer entries, due to the fact that everyones forgotten about the thread, so if a thread were to remain inactive for a whole month, with everyone just sending photos to you, you may get a high volume of entries in the first couple of days, but after a while, if no entries can be seen, people wont want to think they are going to be the only ones entering, so simply wont enter.
Just something you might like to think about, I'm sure you'll be able to make it work :D
P.S. Damn that was one long sentence I wrote! 10 commas Ftw! :p
Disclaimer: You may notice this was posted at just before 1.30 in the morning, so if I have counted the number of commas incorrectly and there are in fact not 10, then anyone trying to nugget me shall be subjected to severe torture via fingerpainting :rolleyes: