New update coming next monday:
http://forums.dayzgame.com/index.php?/topic/165709-pending-changelog-experimental-branch-031114343/I don't think that the 10min corpse despawn time is a good thing.
About finding your own corpse:
You're not supposed to. You've died - supporting that kind of metagaming negates the impact of permadeath. If you manage to get your gear, consider yourself VERY lucky.
If large 2 groups of players end up having a gunfight, it'll be a suicide to go for the corpses, and that way the bodies will most likely despawn before anyone gets any loot. And oh boy will that kill the metagaming
Then again, with 15-20min despawn time players could get to their own bodies from half the map away.
Then again,
again, they could make the respawning a lot slower. 2 - 3 min timer before being able to respawn would solve this completely, since suiciding for the desireable spawn locations might take a very long time. And that way the body despawn time could be over 15min without anyone being able to loot theirselves.