The name Moses could also derive from the Hebrew verb "Masha" (to draw out). In Exodus 2:10, Pharaohs daughter states that she gave him his name "Because I drew him out of the water".
I also consider it unlikely that Moses and Akhenaten were one and the same. I also agree that the exodus was "sexed-up" a bit as time passed and was probably not a major event in Egyptian history.
The connection is partly because Manetho described a priest named Osarseph (Moses?) who apparently took control while the pharaoh (Seti) and his son fled egypt. The son returned 13 years later and restored the gods. Josephus says that Manetho linked Akhenaten and Osarseph, and others then comapred the story to Moses and the exodus.
Clearly this makes little sense as Seti and Ramesses were later, and Seti did not flee Egypt with his son. However, I think Freud was influenced by this in making his unwise statements about Akhenaten.
Incidentally, I recently read an imaginitive theory linking Nefertiti with Jezebel. According to this tale, she was married to King Ahab (allegedly Labayu of the Armarna letters) and set up with Akhenaten causing him to reject the old gods and worship baal and astarte (redefined as the aten). However, she fell from grace and fled egypt only to be murdered by Horemheb (allegedly the biblical Jehu). Of course, Jezebel lived some time after the exodus so this only muddies the waters.
I have started a page on the different pharaohs who have been labelled as the pharaoh of the exodus and comments would be appreciated