Pls check this out, this is real nice post:
Jabber needs more mobility functions
Is something on the roadmap? Does OF support compression?
On a sidenote. Will Sparkweb run on mobile browsers like Windows Mobile, Iphone, Nokia, etc… ?
Openfire supports compression. It supports also privacy lists, so if one is not interested in receiving (and sending) presence packets one can block them.
The x-event messages may as far as I know not be filtered, so typing notifications are still received. Anyhow one could improve the RFC or add an additional XEP which allows to filter also these.
Any chance that Jive will develop a version of Spark for Mobile based platforms?