I just threw it up on our SharePoint intranet server this morning, to which I have full access. You don't have access to any web server that the iPad can access from Wi-Fi? Even a PC or something? Even an ftp server might work, the file would have to be accessible by URL.
If not, you can't save it locally through the UI but if you jailbreak your iPad you might be able to do it - there is an older discussion of how to do it on an iPhone here -
http://etler.livejournal.com/18726.html