Simular cams are on the other sites... just looking 640x480 is a good enough resolution but I don't think 15fps would be enough for decent ball footage in my opinion. Depends what you are planning to use the footage formooching on eBay... saw this earlier. Looks ideal.
http://cgi.ebay.co.uk/WIRELESS-COLOR-HELMET-CAM-CAMERA-ATC-1000-1GB-SD-CARD_W0QQitemZ230028341677QQihZ013QQcategoryZ96999QQrdZ1QQcmdZViewItem
Maybe, depends what the rules entail. If you mean just one loader of paint per person is allowed then its commonly refered to as 'hopped ball' over here.Yeah no probs, prob only use at walk on day at local germany field but will be funny with all their "actung actung" ****e they shout, and you guys ever been to walk on day and played game called "hopper game" ?