*Membership spots not really limited!
I found a couple more hints/homages/Easter Eggs/whatever:
Page 4-5 splash: read what Glenmorgan says, then sing the "Smallville" theme in your head
Page 10/panel 1: background building sign: "Rags and Son"
Page 19: his weird landlady, Mrs. Nyxly. I keep thinking her name should mean something. There was a Ferlin Nyxly, a museum curator,. who had discovered the Devil's Harp( Superman #235)
Page 22: Jimmy's cell phone has a "zee zee zee" ring-tone. Same as his Superman Signal Watch in pre-DCnU issues.
Page 26: the mysterious Hooded Lady cameo.
Anyone spot anything else ?
Mrs Nyxly is really close to the name of a 5th dimensional imp, IMMO.