Unless you have some reason to avoid sharing it, you should let us know what you did so we can properly appreciate it and ideally give us a tool/app to do it ourselves and start making use of it! Explaining *how* you did it is not required, although I personally nearly always do so; it's a good way to build trust.
Having 10 posts will let you create a thread in the Development & Hacking forums, which is really the proper place for announcing a successful hack, but there's nothing terribly wrong with posting it here instead.
Depending on how good your hack is (interop-unlock? full-unlock? bootloader-unlock? arbitrary code execution with full trust?), whether it's specific to Nokia phones or not, and what it requires (special hardware? a particular regional ROM? hard-resetting your phone?) we may start using the hack immediately; any time you sit on it is time we can't even get started. So, let us know what you've got!