The Dev-Team has announced that there will be no jailbreak for iOS 4.0.2 or 3.2.2. It stands to reason, as the release did absolutely nothing other than patch the security hole that was using as an exploit. It's also not a big surprise, minor updates are regularly skipped over. So, if you're a "jailbreaker" and would like to keep it that way, just don't update to 4.0.2. You won't be missing out on anything.
The Dev-Team explains that escalating the "cat and mouse game" doesn't benefit the users, so they're letting this one ride. That's reasonable, too, as I reminisce about radar detectors, laser detectors and the cat and mouse game that happened between lead-foot citizens and law enforcement. No one really benefited, other than the electronics manufacturers who fuel that battle.
It's noted that any future jailbreak for the upcoming 4.1 firmware update might be backwards-compatible with 4.0.2, but don't pin any hopes on it. If you're interested in keeping your firmware up-to-date with the latest goodness, you probably wouldn't be considering that, anyway. Right?