Already working on mine
At first I tended towards one-word suggestions for song titles, because I figured that gave each contributor the maximum possible range of possibilities -- I was thinking of stuff like "Sand", "Sunburn", "Cold Ones" -- but you know, the more we threw ideas around, the later it got, the sillier the ideas got
Seriously though, to everyone who wants to contribute, just come up with something musical with a theme of "Summer". It'll be cool.