- new kind of messaging
- half sms or half txting.
- limited at 140 characters
- subscribe to followers
- finally growing vertically,
- many uses/apis/ecosystem: news, videos, search
- real time electronic message system
- why did he invest?
1) evan williams/blogger and odeo for podcasting (failed; gave money back to investors)
2) side project spun out - twitter and took off.
- twitter is viral and would/could get big (e/g paypal are smart; peter thiel knows that concept)