[Hawkee]

You can say the same for Twitter, Facebook and Google. There is always the potential for downtime, but users generally don't want to create more accounts. I think the advantages outweigh the disadvantages. Plus, sites that use GitHub logins are much more appealing to developers rather than sites that use Facebook or Twitter logins.

[niggler]

Haha Facebook. On 90% of show HN posts involving Facebook logins the top or second to top comment is something like "Facebook login is a nonstarter"

[Hawkee]

I can understand that if a facebook login is required, but offering it as a choice shouldn't be frowned upon.