I disagree. While, yes Natty will ship with LibreOffice by default, it doesn't mean that everyone is going to auto-upgrade to Natty at release date especially if they're going by LTS. 10.04 will still exist and will exist as the LTS for quite some time. So a merge of these tags seems premature for now.

Also, it's not just about support issues, questions like "How do I sent a patch to OpenOffice" would different than LibreOffice, or roadmap questions, or any other question about the projects themselves.