First of all, recruiters don't have the time to delve all that deeply into each URL you post, so if the site isn't live or is about to die, pull the best from it and turn it into a case study of what you can do. Create a portfolio "thumbnail" page with links to those case studies and/or live URLs and put in a note about what makes that site so special that you want to show it off.
If you only have space for a little bit on content on your own personal space (or even if you have tons o' space) and you've got the hardware (or access to it), burn a CD portfolio and make it available upon request (or, if you REALLY REALLY want that particular job, send it in anyway). Even if your portfolio amounts to 15MB or so, having on a CD is faster and more reliable than a download and one helluva lot cheaper than sending it out on Zip disks. As cheap as CD-R media is getting, who cares if you're wasting the other 630MB of storage or so?