I'm a Kubuntu user and I ran into a situation recently where the app I wanted to install only came in an RPM.
Read it at Linuxappfinder
There is one potential issue that I should call out. Typical filenames in Debian and Ubuntu use an underscore to separate the package name and the version. The filename needs to do this in order for the uninstall action to work. However, I wouldn't worry about this too much because you can always uninstall the package using Adept, Synaptic, or another package manager, and the original filename won't matter.