After my previous problem trying to update my Ubuntu server running 10.04 I tried to do a release upgrade.
Before I was able to do this I had to change the sources.list again, this time I used the mirror schema as recommended here.
Old:
deb http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ lucid main restricted deb-src http://ap-southeast-1.ec2.archive.ubuntu.com/ubuntu/ lucid main restricted
New:
deb mirror://mirrors.ubuntu.com/mirrors.txt lucid main restricted deb-src mirror://mirrors.ubuntu.com/mirrors.txt lucid main restricted
The download of 430MB was pretty quick and took around 5 min to complete. Installation took a lot longer...