Well.. Symbian Apps Tends to be addictive... Especially if u are the type who likes tinkering with ur phone... (Which i guess u are.. since u are linux fan..tinkering is inhernt in Linux
).
Well.. Installing symbian app is easy.. (easiest is to send it to ur phone.. apps come with .sis extention, applications will install on its own when u open the .sis file from the phone.. just specify where u want it to be.. ).
Whats cool about symbian apps?? Well for one java based apps run in a 'sandbox' where as symbian apps run inside the OS.. hence works like PC apps, Virtualy the entire phones functionality can be accessed by the apps. (for example My P910i has a app called SMAN, which can show me the details of My phones hardware and reason for the last Restart and uptime of my os).