Not a very exciting one, but yesterday I replaced all four door seals. I think all bar the drivers door seals were the originals, but although they fell apart on removal, they were easy to get out. As many people will know, you need some plastic clips to hold the seals in - those on the front doors wouldn't come out without being rendered unusable, but the rear ones were fine to use again (handy, as I hadn't bought spares of those ones!).
The job was surprisingly easy when I got the knack of it - I did all four in a couple of hours. I used a set of repro seals which I got from German ebay and they were fine. They seemed a little oversized at first, but the trick was to start with the areas that had specific mouldings (door corners, holes for plastic clips etc) and work back from there - any slack was easily taken up along the straight edges of the doors.
Overall a very satisfy and easy job, and with the seals being about £140, not too expensive either. The downside (for me) is that I now know all four doors need rust remedying and repainting!
Next job is to do the outside window brushes/seals, which are on order from a Turkish ebayer who lists on ebay.com