Warning: This post references Anime, Manga, Movies, Modern Fantasy Fiction and Video Games.
*snip*[/QUOTE]
I like this, it helps illustrate that "high levels" depend on the scope. If your adventurer's are only ever saving towns, then lvl10 is pretty darn awesome. Cities? Maybe now you need to be lvl20 to be as comparativly impressive. Galaxies/planes/dimensions? Even lvl30 is not so fantastic when the scope is so large.
Personally, I think part of the issue people are having above is misunderstanding the concept of "god" in the D&D multiverse. A god, however mighty and powerful, is not THE God, nor is it even Zeus, who was incredibly powerful and near The-God-like. Though they have power beyond what most can imagine, that power has limits, many of them have been killed, beaten down, or contained. These gods, even the great ones, are much like the lower pantheons of classical mythologies. They have amazing powers...with limits...immortal life, but can be killed.
I would say SKyOdin is probably most right on when it comes to breaking down the lines between "powerful mortals" and "gods". In pantheistic universes, gods are not so much omni-powerful beings, but superbly incredible mortals. Because they are indeed, quite killable.