I've been working on a NotificationBundle, https://github.com/merk/merkNotificationBundle - still in proof of concept mode, but seems more useful for notifications than using a two-way private messaging system.
yeah indeed ..
The Vespolina project needs a notification system also, lets make sure we are using the same for both project. No need to reinvent the wheel
AFAIK the intention was for @merk to work on this Bundle a bit and then once there is something to talk about it would be proposed to FOS.
I suspect i'll be ready to propose it to FOS some time in the next week. There are a few blockers to where the bundle is at before it is a usable proof of concept.