There is now a Hacker News demo you can try on Spectranext. It pulls the current front page from the real site and shows story titles and links on your Spectrum—so you can read what is hot today without any proxies.
Spectranext is built for the ZX Spectrum user port (48K, 128K “toastrack”, +2, +3). The cartridge has now been exercised on a +3 end-to-end; earlier revisions did not behave there even though 48K machines looked fine.
On the 48K edge connector, several user-port lines are unused or tied to VIDEO. On +3, the same physical lines drive on-board ROM chip selects: the cartridge’s ROM-disable outputs sit in that path. Both ROM CS lines are asserted together when the Spectranet ROM is paged in—electrically consistent, but the +3’s own ROM paging and reset timing are different from a rubber-key 48K.