dynamic nohup?

Is anyone aware of a utility that uses ptrace to attach to a process specified by PID, installs a signal handler for HUP that ignores it, and then untraces the subject process? -- Although efforts are under way to mitigate the problem, this message may contain flippancy, hyperbole and/or confusing assertions. Please reply directly to fall2006sigfile@davidnicol.com for clarification of any points appearing unclear, vague, cruel, frustrating, threatening, negative, dilletantish or otherwise unprofessional before taking action based on misintepretation or misconstruction of such points.