SALabs has a data tap into Twitter data and have been looking at the data around content sharing. When I look at the data here is what I’m seeing for Twitter usage and platform popularity.

Here is the list of the most popular domain platforms for sharing on Twitter

1. Web Obviously, the web based interface found at Twitter.com. Despite being perhaps the least efficient way to use the site, it’s still the most popular method.
2. Twitterfeed Offers to tweet the last posts published in a blog via the RSS feed.
3. API – Twitter API The Twitter API is a catch-all for a lot of clients, all third party of some kind, that don’t set a client-type.
4. TweetDeck Client software and mobile app generally geared towards the Twitter power user, and supports the status streams of many different social services, including MySpace and Facebook.
5. UberTwitter Probably the most surprising entry on the list, UberTwitter is an interface designed for the BlackBerry line of mobile phones.
6. TwitPic Hands down the most popular picture site for Twitter, and quite possibly the most popular web app built on Twitter, the site is integrated with most other third party clients, and allows users the ability to send pictures on Twitter.
7. Facebook Facebook. It’s a social network. You may have heard of it.
8. Echofon Echofon for iPhone “TwitterFon” and for Firefox “TwitterFox”.
9. HootSuite Professional Twitter client, again, geared towards power users.
10. Tweetie A trendy IPhone Twitter app, built for multiple accounts generally regarded as one of the more refined iPhone Twitter experiences.

Clearly the Blackberry is popular. Tons of other players are not on here and are most likely spread across the API and Web domains.

All commentary and additional information welcome – this is only for Twitter sharing when people “flip links” or RT to their friends and graphs.

This is based upon 317 days of collection by SiliconANGLE Labs Twitter experiment. We are running other experiments that include discovery and navigation tools including new advertising related methods to find high quality content and people.