What application do you want ported to Linux?
"A couple of weeks ago, Novell's Cool Solutions on-line users community site posted a survey asking people what Windows-only applications they are using that prevent them from switching to Linux. The survey also asks current Linux users what Windows-only applications they would like to see ported to Linux. Novell's end goal is to take the survey results to the vendors and ask them to work with Novell on making Linux ports available." from Linux Journal.
Well... I'd like to see Photoshop on Linux, :-). The Gimp is easy and fast, but I think Photoshop has more features and the interface is a little better than Gimp's interface.