Mark SullivanSenior Editor, PCWorld

Mark has been writing about networks - social and wireless - since 2005. Independent and outgoing, he enjoys travelling, wine, and skiing. His favorite book is "Atlas Shrugged" by Ayn Rand.

3G/4G Performance Map: Data Speeds for AT&T, Sprint, T-Mobile, and Verizon

See our neighborhood-by-neighborhood test results for 127 locations in 13 cities. Click the map for raw speeds, as well as Web page and video load times.


3G and 4G Wireless Speed Tests, Windows 8 Editions, and Google Drive on PCWorld Podcast #136

Can Google Drive compete with Dropbox? Which wireless carrier has the best real-world speeds? How many editions of Windows 8 will you really have to choose from?

3G and 4G Wireless Speed Showdown: Which Networks Are Fastest?

We tested 3G and 4G wireless data transfer speeds--indoors and out--for AT&T, Sprint, T-Mobile, and Verizon, at multiple locations in 13 major cities. Here's what we found.

The 'Archive Team' Rescues User Content From Doomed Sites

Jason Scott and his merry band of hacker-archivists are trying to preserve our “digital history.”

SXSW in Review, Problems With the New iPad, and GeForce 680 on PCWorld Podcast #134

Mark tells us what was new at SXSW, Melissa raves about the iPad display but points out battery problems, and Nate enthuses about Nvidia's efficient new GeForce GTX 680.


Beats Audio (HTC) Acquisition of MOG All But Done, Sources Say

A price in the neighborhood of $17 million has been agreed upon, and the parties are now working out final details before an announcement is made, sources close to the situation say.


Rexly Puts All Your Mobile Music in One App

The app was one of the finalists at a start-up smackdown for music apps here at South by Southwest.

Americans Elect Wins SXSW People's Choice Award

The independent election site will let people elect a presidential candidate who will appear on the ballot in November.

The DasKeyboard Brings Back the Feel of an IBM Selectric

The retro peripheral from Metadot is a real throwback but may actually help some people type faster.

eBay Has Big Plans for New ‘Watch with eBay’ App

You can buy products about shows now, but eBay wants you to be able to buy products that appear in shows.


SXSW Cool App: Zamp Helps You Make Sense of Air Travel

This app lets you track your flights, get real-time info at the airport, and even reach out to other travelers.


SXSW Cool App: AgLocal Lets You Buy Meat From Local Growers

This start-up plans to connect carnivores with local ranchers.


Hot Apps and Web Services of SXSW

The best apps we've seen at South by Southwest Interactive help connect you (safely and securely) to the world and people around you.