im thinking about dual booting ubuntu and vista, the only thing that i am worried about is. will any of my stuff i have saved be deleted? because if it is i obviously wont install ubuntu
It makes it really easy, and doesn't split partitions. You'll have all of your Ubuntu files on your c:\ - or whatever drive letter - partition, so there is minimal, if any, chance of curruption/deletion.
Wubi makes a transition a lot easier, and will aid you in your future Linux endeavors.
Vista has a way to edit partition live while in the OS, you can use that shrink the partition you are currently using a bit and install ubuntu on that.