I bought 2 expired domains (not penalized) and made a website on this domains. The websites with the content is online since 4 days. Downloaded the plugin Sitemaps XML, submitted the content on Google, let it run through my indexer service - no single page indexed yet. Same with 2 of my brand new domains. One of them isn't indexed yet, the another WAS indexed, but now it seems to be indexed (?). Some keywords were also in the Top 20, but now all keywords are gone. I can't imagine that this domain got penalized, since its only 2 weeks old, I builded no single backlink to it and all content is original. Someone having the same problem with new websites/content getting indexed? Or did my domains just got sandboxed?