I normally wear a water-resistant fanny pack, in the front, that holds my phone, charger, wallet (sometimes) or whatever I would want to get to easily while out riding.
It's not fasionable, but being in the front and mid or lower abdomin, it seems like I wouldn't roll over it much if I was conscious and in a tuck as I rolled out of a get-off. No guarantees, but it works for me compared to the limited space/pockets in many summer mesh jackets.
Here it is: http://www.amazon.com/Extreme-Invisi...rds=fanny+pack
Extreme Pak Invisible Pattern Camo Water Repellent Waist Bag
by BF Systems
I'm not a camo-wearing guy, but for function it fit the bill, so it got bought and continues to get used.
But I don't ride a sport bike anymore. With a sport bike the tanks would normally interfere with a pack in the front.