it's pretty cool that technology is uncovering more and more of the tip of the iceberg.it's hard to tell how many dimentions there are, but it does seem to have a bent or full circle like D88 was talking about.
it is a know fact that all stars/galaxies/asteroids/ect..seem to follow the same governing rule of the universe that almost all matter, even atoms are round or circular. so it is concievable that even our own universe is also bent or round is some sort of sence.
i even would'nt throw out the idea of our universe even being just one of many universe's. only one can amagine, but even our brain cannot comprehend the complex works of it all.