Argh. It's too late for 2) - totally missed that.

Would it help to redirect the sitemap to the new domain's site map instead?

Thanks - seems google picked up the new domain

I had one bug - though php would do a 301 redirect but does a 302 by default. This is why it was not updated for some time.

I had 2 sites on the web (www.physicseditor.de, www.texutrepacker.com) and decided to move them all under one single domain (www.codeandweb.com)

Both sites were ranking very good for several keywords.

I not redirected the most important pages from the old domains with a 301 redirect to the new subpages (www.texturepacker.com => www.codeandweb.com/texturepacker)

Google still delivers the old domains but the redirect take people directly to the new content.

I've already submitted the new site map to google webmaster tools. Pages are already in the index but do not really show up in the search results.

How long does it take until google accepts the new domain and delivers the new content in the search results?

Was it ok what I did? Or is there some room for improvement?

SeoMoz will of course not find any information about the new page since it is not yet directly linked in google. But I can't get ranking information for the "old" pages since SeoMoz tells me that it can't crawl the old domains....