For Lyta specifically, read Neil Gaiman's Sandman.
The other Infinitors . . . Some of them show up occasionally. Nuklon is now Atom Smasher. This Dr. Midnight is ignored/forgotten. Obsidian is supposedly on the JSA. Jade died. Who else, who else. Oh, Hector Hall was Dr. Fate for a little while. Northwind is laying fallow, now, I think. Who else? Yolanda is forgotten/ignored, too, I think. Rick Tyler is currently exceedingly happily married to Jesse Quick. Sly Pemberton died, leaving his legacy open--Courtney Whitmore took up Star-Spangled Kid for a while, but there's been no new Skyman, despite Robinson's plans in Starman. I think that's it. Kind of a mixed bag, really.