I'm currently installing Desktop and Server right now and the only 
difference as Jeremy mentioned earlier is the lack of a X GUI for the 
server installer. I still maintain that no software package is exclusive 
to one edition of Ubuntu as it certainly wouldn't make sense if there were.

Mike Miller wrote:
> On Thu, 6 Dec 2007, Elvedin Trnjanin wrote:
>
>> I don't recall any differences between the two with the installer or 
>> anything that is exclusive to one edition of Ubuntu. The only real 
>> difference is the default packages you get with the ISO. If you get 
>> Desktop, you can get all the software for Server. The opposite is 
>> true as well.
>>
>> However, I could be wrong.
>
>
> Right, the thing is, you could be wrong, so I want to find someone who 
> has already done it.  This is the closest I've come to what sounds 
> like a definite answer:
>
> http://www.ubuntugeek.com/installing-lamp-using-taskeldesktop-edition.html 
>
>
>    The second way to install is using TASKEL. a TASKEL is a software
>    application tool that groups some packages into tasks and allows the
>    user to install the packages from the task.. u can install it from the
>    terminal by typing.
>
>    sudo taskel install lamp-server
>
> I guess I'll try that -- using taskel.
>
> Mike