Fedora :: Getting Dependencies For Offline Installation?

Administering offline Linux boxes can be a serious pain. The Debian flavours now have keryx to make life easier. Keryx is a cross-platform application, which means one can get the dependencies from Windoze too. Is there any similar package for rpm/fedora based flavours? In the absense of a proper Offline manager, I was also wondering if there is a way to collect the output of:

Code:

yum deplist <package>

... condense or sieve out the double listings, and pipe that to a text file? One can copy the output and run

Code:

yum reinstall <paste them here> --downloadonly

and get all the required dependencies from the yum cache. If all that can be accommodated in one script... then that's pretty cool. I don't have the scripting know-how to dive into this.