I'm using Debian GNU/Linux + awesome. Inside it I use virtualbox with ms windows. Most time I spend in Linux, however I constantly need to monitor if something new happens in the guest system.

Is there any way to make virtualbox alerting about any changes on guest screen (clock is disabled, therefore only new mail or instant message may change the screen)?

PS. Unfortunately I can't to move mail and instant messages from windows due to specific clients for only internal network.