It'll be interesting to see how Moss fits with the niners. Expect them to take a wide receiver with their first or second pick, and perhaps they're just using Moss for a single season until that prospect is ready to really contribute. They cut Braylon Edwards with no fanfare, so I doubt they'd put up with much distraction from Moos before letting him go if he can't stay on the straight and narrow.
I'm not worried about Josh Morgan leaving. Kyle Williams shows a lot of promise at wideout, and new draft players should round things out nicely. IMO, someone paid Josh Morgan way too much money for the player he's been so far.