The
tag set is now in its final form, for better or worse; if there are any remaining mistakes, I am afraid we will be stuck with them. Thanks to everyone who contributed corrections, especially the eagle-eyed Morbane.
Three Marvel characters decided to take a wander through the tag set, as is customary: Maria Hill, Tony Stark, and Scott Summers. To keep them in the right places, you will find that they have gained some repetitive extra bits to their tags; these can be ignored from the point of view of using them for your requests/offers.
I have turned the tag set into a Google docs spreadsheet
here. This may be more useful but may also contain mistakes; in the event of discrepancies, the tag set on AO3 should be taken as definitive because that's what sign ups and matching will be working on. If anyone has suggestions for improving the presentation/useability of the spreadsheet, I am open to them (or if anyone wants to make a nicer version, I will happily link to that instead).
For those who are interested, the final count is 233 fandoms, 1677 characters (so 1211 characters outside "No" and "Original") and a whopping 1463 worldbuilding tags.
Sign ups will open very shortly.
ETA: Don't forget to check the Uncategorized Fandom section. All of Harry Potter and Middle Earth are in there, along with quite a bit of Star Wars. And many other fine fandoms.