What is the relationship between bitbucket.org and bytebucket.org? Is the latter owned by the owners of the former, or is it some sort of scam?
WHOIS records show that both bitbucket.org and bytebucket.org are registered to the same registrant.
They are also both running the same web server software. They're hosted in different netblocks, but both netblocks are owned by Amazon.com Inc.
I have an account at bitbucket.org. I tried signing in at bytebucket.org but I'm having trouble reaching any https page at that site right now. So I can't confirm that they have a common authentication between the two sites.
Okay, I have done a test: changing my account profile on bitbucket.org. The change I made was reflected at bytebucket.org immediately. It's still possible that bytebucket is a scam -- it might be a proxy to bitbucket.org, as an attempt to capture passwords.
bytebucket.org is owned by Bitbucket. It is/was used for serving files uploaded to the wiki repositories, to prevent cookie theft and the like if memory serves.
The rest of the domain should probably be configured to redirect.