I see this as largely coincidental, and nothing nefarious. If you follow the link from the page to the archived version [1], look among the dozens of subjects, click on Ethics, scroll down to near the bottom of the page, you'll see the single paragraph he's referring to. It makes up for about 0.1% of the total content. It's unlikely the administration took down an entire website just to hide Obama's whistleblower promises.

What's more likely is that that, since Hope/Change was the old slogan and "Forward" has replaced it as the new slogan, it's time to take down the old site because it's simply outdated.

C'mon guys let's show a little critical thought and stop looking for conspiracies where they don't exist. It's bad for our credibility. Things are bad enough as it is with the stuff the NSA is actually doing.

[1] http://web.archive.org/web/20130515024407/http://change.gov/...