Feisty upgrades?

[Akshay Lamba]

NoOp wrote:
>> Feisty was released on April 19th. Since then there have been 3 security
>> updates (see linux.ubuntu.security.announce).

How does one check if these updates are installed on their system? I 
haven't noticed any updates in a while too. Have cross checked my 
sources.list and it looks fine. I've been using feisty since beta and 
have been finding this behavior a little strange myself.

My sources.list:
alamba at lamlap:~$ cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ feisty main restricted universe 
multiverse
deb http://archive.ubuntu.com/ubuntu/ feisty-updates main restricted 
universe multiverse
deb http://archive.ubuntu.com/ubuntu/ feisty-backports main restricted 
universe multiverse
deb http://security.ubuntu.com/ubuntu feisty-security main restricted 
universe multiverse
deb http://ubuntu.beryl-project.org feisty main

A