Here's a little something for the "nothing can hurt the Juggernaut" camp:
And here is an entry from The Official Handbook of the Marvel Universe that shows Juggernaut's strength
(note that Hulk, Hercules, etc. were listed as Class 100):
Furthermore, here is a scan that clearly states that Juggernaut has a limit to his strength (unlike the,
literally, hundreds of examples that say the contrary about the Hulk):
Here is the Juggernaut being stopped:
And here is a scan of an e-mail from Christos Gage, the writer of the
World War Hulk: X-Men
crossover in which the Hulk fought the Juggernaut: