I noticed this a while back but never posted it. It's an extremely small connection, but it's interesting nonetheless. In the original script to "True Romance", as Clarence segways (sp?) into the "CLARENCE & ALABAMA" sequence, Clarence asks Dick if he "remembers the Lyric". The Lyric movie theater is the theater where Clarence watches the Sonny Chiba triple feature. It is also the name of the theater Travis takes Betsy to on their date (the whole porn movie fiasco). Later.
P.S. As a side note, in "Taxi Driver", Iris' dad's name is Burt Steensma (as indicated by the letter Iris' family sends to Travis in gratitude of his actions toward their daughter). This is also the name of the would-have-been judge in "Natural Born Killers". That is, if Oliver Stone hadn't fucked with the script. You can still read the original. Tarantino's Judge Burt Steinsma appears during the "American Maniacs" sequence.
P.S.S. An even more vague referece: In Jim McBride's remake of Jean Luc Godard's "Breathless" (starring Richard Gere), one of the crew members' name is MICKEY KNOX. I don't know if this is where QT got this name from, but I know McBride's "Breathless" was a huge influence on "True Romance", which, as we all know, started as a huge script called "The Open Road", whoch featured elements of all of QT's earliest scripts. I know it's not lifted from "My Best Friend's Wedding", because, from what I've read, Mickey's last name in that film was Burnett or Burkett. That's all.