Today’s funding and acquisitions news roundup from across the web:

Mobile

Mobile Payments Startup Billing Revolution Raises $6.6 Million (via TechCrunch)

StackMob stacks up $7.5M to be Heroku-style backend for mobile developers (via VentureBeat)

Social Media

Tradeshift reinvigorates invoicing with $7 million in funding (via DealsBeat)

IT/Enterprise

SanDisk buys enterprise flash memory firm Pliant Technology for $327M (via VentureBeat)