I am a long time linux user, and just got an iPad as a gift. The first shock came when I turned it on, and found that it won't do *anything* until you hook it up to a computer with iTunes on it. There is no iTunes for Linux, iTunes doesn't work under wine (Linux's Windows emulator), and I have no intention of installing Windows in a VM on my Linux box. I believe that the WIndows EULA specifically prohibits installation on a VM anyway, for those who care about following the terms of the EULA. Fortunately, there was an Apple store nearby, so I was able to take it there to be actviated.
I have to admit that the iPad is a sweet little device, but I am really used to telling my computer what I want it to do. The iPad is more of a device that tells you what it will let you do. As with most things Linux, there are ongoing projects to make the iPad workable under Linux, and I will be trying them out as they develop.
Now I should probbably point out that "Wine Is Not a Emulator"!!!!
I to am a long time linux user, (starting with slackware '96), But I am also a software developer and have found that I tend to follow the $$$ for projects and on occasion that does lead me to windows, so I keep a XP VM with a copy of VS 2008 ready for those.
If you read the windows XP or windows 7 EULA it infact encourages you to install windows in a VM, (only vista prohibits it, but thats because microsoft was embarressed about the performace of it on a dedicated machine, let alone a virtualized one. )
The EULA states that each installation is to be paid for, If you purchase a 'boxed' copy of XP or W7 you can install it on a second machine when you have removed it from the first. Microsoft wants you to install windows VM's because this way they get more $$$ for each one that you install (because you have to pay for each install that you make into each VM).
When I worked for a multi-national company Windows was available only in VMWARE
Some are not transferable to other computers (OEM copies that come bundled with hardware.), and some have 'conditions' ("Upgrade licences" require a previous Microsoft OS installed on that machine.).
Now if you can get the pad 'activated' (Note: Ask them @ the store and they will for you. ) then it works pretty well on its own. If you need to transfer music to it from your MP3 collection On linux you can either 'jailbreak' it (there is a linux JB available for the iPad) & use RythmBox to listen to music _OR_ you can use a app called "iFiles" from the appstore which allows you to either 'pull' music from the web or push music to your device via webDAV.
I ended up buying a 27" iMac for my oldest daughter and I now just use iTunes to manage the music on it (In actual fact I feel very comfortable on the iMac as its shell is just BASH, and it has 80% of the unix tools that I would expect to have. But I guess that OSX 10.6 is not POSIX compliant out of the box these days).