Hello tommyp,
As said before: big thanks for the effort and the list you compiled! I've updated my stickied post now to avoid any duplicates. However I have a few suggestions and improvement ideas:
1) It might be a good idea to have a special column with possibly a link to the corresponding thread in case the inclusion of an update requires more than just putting it into the respective directory. There are some problematic updates that need additional treatment like special .reg files to be included. I deal with some of them in my list.
2) It should be easily visible for each update for which sources it is valid. Basing on SP3 is okay, but there should be a differentiation between WM9, WM10 and WM11, and between IE6, IE7 and (in future) IE8. Maybe additional columns (I know, even more

) could be used, marking with an "X" the applicability of this update. Some updates are valid for only one WM and/or IE version, others for several at once (with the D/L links still being different).
Additionally some time in the future you might encounter problems with language-specific updates in case you want to link directly to the files.
The best solution would be something dynamic like TC76 had it, but I can imagine this to be too much work...
3) Could you add the date to the .cab files (e.g. for WU/MU) also? I'd suggest to use the server-side date of this files (exact day, not only month and year). Thus updates could be recognized easily. Alternatively the versions should be shown.
For the LegitCheckControl.cab I'd use the generic link (http://go.microsoft.com/fwlink/?linkid=39204) instead of a version specific one, as it might get updated occasionally. The same for OGAControl.cab (http://go.microsoft.com/fwlink/?linkid=67633).
4) There are some outdated links in the list as well. Scanning it quickly I at least identified that you have KB950760 (cumulative ActiveX update of June) listed but at the same time KB956391 also (cumulative ActiveX update of October, which fully replaces the previous one).
And you should mention that the time zone updates via the .cab files (HFTOOLS package) are not the most recent ones.
I hope I have time during Christmas holidays to fully review the list. Perhaps we can again achieve a separation between a part with critical (mandatory) and a part with optional (recommended) patches.
Regards,
Tomalak