PUBLIC MARKS with tags web & web-based

Does it makes sense to get everything running inside a browser ?

eBuddy is a web application that enables you to chat with your MSN, AOL and Yahoo buddies without having to install any program or Java applet. To use the web version of eBuddy, all you need is a JavaScript enabled browser on your computer and it works even if you are behind a firewall. If you are on the road, you can use the mobile version of eBuddy to chat with your buddies. Every mobile device that supports xHTML or WAP can be used.