Paul Yanez created a functional mock-up of Joost-in-a-browser to prove that it was "possible to build a web based application that does not require any downloads, that is comparable to the downloadable executable Joost application. This mashup has been done with 1 flash file as compared to Joost which requires 100's of files."
"Joost does not support browser based viewing, to use the application it must be downloaded and installed. In the last several months users have been forced to continually download and upgrade the Joost software in order to continue using Joost. The flash based version works in all browsers on all operating systems. All enhancements and upgrades are transparent to the user and the application continues to retain the user preferences since the application is hosted on a server."