Relative scale of mobile products

Earlier tonight I asked about mobile monthly unique users for various products.

Here is a compilation of that data along with some others:

• Facebook – 350 million – publicly announced
• Google Maps – hundreds of millions – estimate
• Angry Birds – 30 million daily uniques – Mashable via Anil Dharni
• Twitter – tens of millions – estimate
• Pandora – 20-30 million – based on 37 million total in SEC filings
• TripAdvisor – 10 million – tweet from TA employee
• Yelp – 5 million – from Yelp PR
• Where – 4 million – announced at time of eBay acquisition
• foursquare – 400,000 – tweet from Rabois