[mkramlich]

here are some more common patterns that HN seems to find acceptable:

1. <something-something-something> Google?

2. <something> Facebook <something> Apple?

3. when will <Apple|Google|Facebook|Amazon> do <my personal whim here>?

:P

[pgbovine]

here's one more to add to your list: if you do an automated text meta-analysis of "Ask HN" titles and see what words/phrases are correlated with more upvotes, then post your analysis on a blog post, i'm sure people would upvote you like crazy ;)