Well I have a phone interview sometimes next week. Still coordinating the details.
The one problem was that when I first got the email asking for time I'd be available, I couldn't remember the details of the actual job. Luckily I save everything I submit job-wise in a folder on my computer precisely so I don't get caught in this situation, and because I've applied to so many things that I know there's no way I can remember all of them. I did in fact save the cover letter I sent to them (labeled with the name of the organization so I knew which one it was) and just grabbed a copy of the job description off their website for my own reference.
Thankfully I predicted my own shortcomings on this one and set up a paper trail that's easy to follow, or I'd have serious egg on my face. In fact, I could probably even spin that into a weakness I'm working on if they ask that question.
One benefit to saving all the cover letters I send is that I can then cross-reference which ones got responses and which ones didn't, and in the process figure out what did or didn't work. I think I'm much better at writing them now than I was even a few months ago because I've been doing that.