Evan Williams, co-founder of Twitter, gave some telling stats on the Twitter blog
Mobile users have jumped 62% since mid-April
16% of all new users to Twitter now start on mobile (it was 5% before Twitter started doing branded mobile clients)
46% of active users use some sort of mobile Twitter experience
78% of people who interact with Twitter still do so through twitter.com — though that number includes people who use more than one app
m.twitter.com is the second most-used Twitter interface at 14%
SMS and Twitter for iPhone are tied at 8%
Here is a chart showing the most used ways to access Twitter. One thing I will note that while the post started out concentrating on mobile numbers it becomes less and less clear which numbers are about overall Twitter usage and which are about Twitter use overall (at least for me that is).
Of note as well, there are now more than 145 million registered Twitter users that use some 300,000 registered applications to get the most from the service. Remember the days of being excited about hitting 20 million users? Those are getting smaller and smaller in the rearview mirror for sure.
Twitter keeps rolling along but there was no talk about making money. That might ruin the mood of the celebration.