Good. This guide is also applicable on the N9/50, and IF I ever happened to buy an N9, I can pretty much package everything on it as I do right now on my good ol' N900.
dpkg-deb -b /path/to/package
tar: unrecognized option '--format=gnu' BusyBox v1.19.0.git (MeeGo 3:1.19-8+0m6) multi-call binary. Usage: tar -[cxtzjhmvO] [-X FILE] [-T FILE] [-f TARFILE] [-C DIR] [FILE]... dpkg-deb: subprocess tar -cf returned error exit status 1