Straight is the gate and narrow is the way, and few are they that enter therein. (somewhere in the Bible, I forget where)
Doesn't leave a lot room for the "all roads..." theorists.
Doesn't leave room for the "all religions" theorists, but, like Pablo, I believe all roads lead to God. Doesn't mean "all roads" allow entry to Heaven, but they all lead to the Great Decider.
Sorry, but I can't be that generous, in all honesty, mainly because Jesus wasn't, either:
John 14:6
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
I don't know what the Greek word was that "way" in this passage was translated from, but I know the Latin word for "way" is "via" (WEE-ah). In Latin it means, "by way of" (same as our usage of it today), just plain "way", or more broadly, a "road" or passageway (Via Appia or Appian Way/Road). I'm assuming the Greek word for "way" is just as broadly defined in this, so I could be all wet. But....
...whatever the case, He could have just as easily said "road" or "path" instead of "way" and His point would have been just as well made: Only ONE road/path/way leads to the Father, and He is It. Period.