OK, well, apparently it's for really-real this time. The launch will be accompanied by a big media / advertising campaign, so I'm guessing that it'll happen earlier in the week than later. Excellent.

"After three release candidate builds, Firefox 1.5 is expected to be made available for download this week. And when it does arrive, it will be accompanied by a marketing campaign aimed at getting Firefox 1.0 users to upgrade and convincing users of other browsers to switch."