Editor’s note: Dan Greenberg is the founder & CEO of Sharethrough , the native video advertising company. Dan has been honored as an AdAge “Media Maven” and was recently named to the Forbes “30 under 30″ list. You can find him on Twitter at @dgreenberg

This week, two of the major players in the credit card industry, Visa and MasterCard launched their online digital wallet services. Known as V.me (Visa’s) and PayPass Wallet Services (MasterCard), both are very similar initiatives which see the companies clamoring to become the credit card of choice for digital transactions, the way they fight today to be the credit card for all the other transactions taking place out there in the real world.

Last December, Postmates launched with the plan to offer up a courier delivery service for local businesses throughout San Francisco. But then the team had a brilliant idea: What if it gave its couriers pre-paid debit cards, which would let them purchase goods for customers and then deliver them anywhere in the city

The  Inside Network Job Board  is dedicated to providing you with the best job opportunities across social and mobile application platforms. Here are this week’s highlights from the  Inside Network Job Board , including positions at: Townsquare Media ,   Lowe’s , Sociable Labs , Fiveonenine Games ,  SponsorPay ,  IMVU ,   Sneaky Games ,  GameHouse ,   Ryzing , Machine Zone ,  King.com ,  Kixeye ,  PopCap Games ,  Nuukster  and  SoJo Studios .

Editor’s note: Guest author  Keith Teare  is General Partner at his incubator  Archimedes Labs  and CEO of just.me . He was a co-founder of TechCrunch. Follow him on Twitter @kteare

“The minute you tell someone that images on your server disappear, everyone jumps to sexting.” Evan Spiegel laughed and leaned back into his chair during his first sitdown interview since his iPhone app Snapchat blew up over the last month. Snapchat  is #12 on the free iOS photo app charts in the U.S

The Gillmor Gang — John Borthwick, Robert Scoble, John Taschek, Kevin Marks, and Steve Gillmor — turned off their minds, relaxed, and floated downstream on the push notification inbox of tomorrow. Borrowing a page from the Tibetan Book of Windows, the Gang debated the impossibility of multitasking, the existence of a new uber operating system, and the overall impact of surrendering to the void. Revolver marked the exact center of the Beatles arc; everything before was prologue, everything after continues to expand as the media is transformed

If your response to virtual infrastructure installations is a derisive “Boring, Sidney, booring” then maybe AngelPad startup ElasticBox isn’t for you. However, if you love cloud computing like Nancy loved heroin, I think you may be in luck.

Last year, nearly half a million completed Dropbox ‘s very first “Dropquest.” This time, designer Jon Ying and engineer Rajeev Nayak say they “honestly don’t know” how many people will participate, but with the company’s rapid growth , it’s a safe bet that the number will be bigger. Nayak describes Dropquest as “a gift to our users.” It’s an online scavenger hunt where you solve logic puzzles while also learning about Dropbox’s key features

As we approach the E3, the electronic gaming show in early June, I suspect that the value of “retina” high-resolution displays will soon become apparent. While the prospect of retina Macbooks is all but inevitable, we have reached a plateau when it comes to general computing and, more important, living room media. The first question is, in short, why do we need a retina Macbook ?