I can tell you what we are doing in beta, but it is subject to change, tweaking, etc. before we launch in order to avoid exploits.
Currently, if you crash out/disconnect, when you return as long as you don't move, cast, attack, etc. you have a temporary invul buff on you. The idea is that you have some time to re-group with your party members and re-orient yourself, especially if you disconnected in a nasty spot.(beta 2)
Source: Aradune Mithara