Just to throw in my few cents...

The SFS' .recycled really does not work like a Windows user would expect from a Trashcan - it does not store just the deleted files, but also versions of old files (depending on how an application updates them).

Now, it'd be quite easy to add a Trashcan to the OS since it seems there's some demand for that. I'd be willing to do that for a 400 eur bounty which would cover extending Ambient with the functionality.