There's no reason to believe the "talk" will happen anymore. I'll write a rough timeline of events for future reference, only because they went their way to be as opaque about this as possible:
2025-01-16 (or earlier, and nobody paid attention before the "protest" announcement): Talk page (
archive) goes up, mentions Dorsey and Surtani, links to Surtani's newly made page (
archive). Scheduled for Sunday, from 12:00 to 12:30, it's categorized as a keynote.
2025-01-16: Drew posts "No billionaires at FOSDEM". The URL ends with "please", but it's not in the final blog title. (
direct link,
archive)
2025-01-16: FOSDEM announcement "Statement on planned protests during the upcoming FOSDEM 2025". (
direct link,
archive). Does not mention what "protests", but says something about "controversial" speakers, asks to contact them so they can comply with safety regulations at the event.
2025-01-16: Drew's first blog post is submitted on HN (
direct link,
archive). 207 comments, ultimately flagged, along with many comments in it, some of which talking and linking to the reports. You need an account and the setting showdead on to view them.
2025-01-17: Speaker page is made for Dorsey (
archive) and is added to the talk links (
archive), but without an avatar, that will be added the next day. The event is moved from "Keynotes" to "Main Track - Janson [room]", the Main Track page is likewise updated (
archive).
2025-01-18: Some websites begin to cover the subject. CNX (
direct link,
archive, note the DeVault report being linked in the comments). Wikipedia page has subsections for 2023, 2024 and 2025 events added (
link to event page,
link to revision) by User:AyubuZimbale (
link to profile, made in 2024-11-04). Among the referenced sources are the FOSDEM statement and CNX's article; Drew's blog post is also cited in "[...] within the open-source community due to ethical considerations", along with some others sources about how "open source developers" think Bitcoin and cryptocurrencies are unethical.
2025-01-19: A certain Esther Payne (
mastodon page) posts "FOSDEM and Billionaire Fascists" (
direct link,
archive), it has some details on the event if you can bear reading it.
2025-01-20: Drew posts "FOSDEM '25 protest" (
direct link,
archive). Acknowledges FOSDEM's statement, reports that the event has been moved from keynote to main track.
2025-01-21: The talk page is stealthily removed, so is Dorsey's (
archive). FOSDEM's statement is submitted to HN (
direct link,
archive), a small discussion ensues.
2025-01-22: Payne publishes another blogpost "A call for transparency from FOSDEM" (
direct link,
archive), in response to the deletion of the pages.
2025-01-23: Drew posts "Join us to discuss transparency and governance at FOSDEM '25" (
direct link,
archive), updates previous page, mentions Payne's blogpost, the page also has images of the pamphlets prepared for the event.
2025-01-24: Lunduke covers this subject (
direct link), "Jack Dorsey Keynote Cancelled After Protest Threat by Child Porn Enthusiast, Extreme Leftist".
2025-01-28: An article is made on LWN (no gift link available at this time,
will become public February 6th, 82 comments so far). LWN is the first major site to write about it, and reports "The keynote has since been removed from the schedule, but there are still a number of lingering questions".
2025-01-29:
Jack Dorsey posts an image of Drew's phamplet on X/Twitter. (
direct link,
archive). Make of that what you will.
Surtani has since been moved from the keynote (and later talk) with Dorsey to a new one called "Making the Financial World Open Source With FINOS" (
direct link,
archive), different room, track, time and with another speaker (Gabriele Columbro). I expect the organizers will expand on all this once the event, which will take place from tomorrow for two days, will be over.