Yahoo today released two new important mobile apps, a native Flickr iPhone app (iTunes) along with a Yahoo Finance BlackBerry application.

The Flickr iPhone app is now the best way to upload, manage, and share your photos on Flickr via the iPhone. You can seamlessly upload photos and add information to photos such as descriptions and tags. You can also view and comment on photos from other users.

The iPhone remains the most popular cameraphone on Flickr, and is currently almost the most popular camera used on Flickr. The iPhone currently remains in the second spot behind the Canon EOS Digital Rebel XTi as the most popular camera used on the service.

Yahoo today also released its new Yahoo Finance app for both the BlackBerry and iPhone (iTunes, BlackBerry). You can easily customize your portfolio complete with quotes and graphs, and even stream video and read news through the app.