Can I help you? On Twitter, the answer is no.

Objective: Figure out how to backup files on Outlook

Twitter: Not long after I tweeted @MicrosoftHelps, a representative called Joe who signed his tweet "^JC," responded with a link to a how-to page with step-by-step instructions on exporting to a .pst file.
Time: 18 minutes
Problem solved? Yes

Phone: Representative wouldn't offer actual advice, just referred me to various other customer service outlets. Most of them not free, unless I had a warranty (par for the course in the industry).
Time: Less than 5 minutes
Problem solved? No

Website: Connected with a person via live chat, but was referred to other (mostly paid) customer service channels.
Time: 4 minutes
Problem solved? No

Verdict: Twitter wins! And it solved my problem for free.