Considered, yes, but Uplink is not open source, and it's not my right to do it either. I know the source is generally "out there" but the legality of that is murky.
Have you tried reaching out to Chris DeLay and asking him about it? He might be okay with it!
Does Onlink use any of the Uplink source, or is it written entirely from scratch? If the latter, it's definitely within your rights to open-source.