Nimbuzz has been updated to version 3.2 with message notifications and some
new features.

The new features are

Message Delivery Notifications will display checkmarks when your message
arrives on your friend's phone.New Favorites Tab offers quick access to
your favorite contacts so you can start chatting and calling
faster.Reintroduced the # shortcut – by pressing the # key you will go to
the top of your contact list.Auto-start – offers the possibility to
automatically start Nimbuzz when you turn on your mobile phone.Download the
new version by going to m.nimbuzz.com on mobile browser.
source[nimbuzz]