Episode 50 of Brave Ad World is here. It's been a week of redesigns, upgrades and rollouts (so much for a quiet December).

This week's headlines are: StumbleUpon Undergoes a Redesign and Brings More Opportunities for Brands, Instagram’s On Its Way to Android and Twitter’s Overhaul Dramatically Changes the Platform.

The week's news quick hits are: Foursquare Reaches 15 Million Users, The Facebook Timeline Rollout Finally Begins, Klout Adds Visual Modifiers to Klout Scores, Groupon Tests Appointment Booking Service, Facebook for Android Gets Updated, Schemer is Google+’s Answer to Facebook Events, Spotify Offers More Unlimited Options and YouTube Updates Its Video Manager Tool.

Find it on iTunes or in the podcast section to add it to your preferred podcast player.

Reach out and let us know your thoughts. Leave a comment, find us on Twitter or send us an email to braveadworld [at] gmail [dot] com.

Have a great week!