Our partnerships with Gnip and DataSift are set up to offer access to the full Twitter Firehose. If you're hitting limits with the Streaming API (400 track keywords, 5,000 follow userids, and 25 0.1-360 degree locations) and are doing data analysis or building non-display applications, please contact one of our partners below:
Gnip - @gnip
Gnip offers a variety of products that allows enterprises to license high volumes of tweets. Their PowerTrack product enables you to precisely filter the Firehose with numerous search modifiers to access just the tweets. Additionally, their volume feeds such as the Decihose, allow you to sample from the Firehose in volume. Contact Gnip for more information.
DataSift - @datasift
DataSift is a real-time media curation platform, allowing you to mine the Twitter Firehose for tweets matching the specific criteria of your choice. DataSift's custom Curation Stream Definition Language allows you to filter based on any meta data within a tweet, in addition to a number of other data providers from around the Web. Contact DataSift for more information.