Google Indexed Wrong Tags During Website Maintenance

[talismon]

We currently have several pages of our site that were updated with our 'maintenance page' and now the titles/descriptions are being displayed in the SERP's with this page.
What's the correct tag to put on our maintenance page to avoid this?

Right now, when the site is in a maintenance mode, all requests get 302 redirected to /system/maintenance.html. If we were to put a noindex on the maint page, I would assume it would get associated with the /system/maintenance.html URL, not the original URL, but I'm not positive. Does anyone know for sure?

[ciml]

Personally I would try to ensure that Googlebot always gets good content.

Perhaps you could return a recent cache of each page during maintenance?