During the closing credits of "TGS" shown onscreen, Lorne Michaels (executive producer for "30 Rock") is listed as one of the writers.
The beer Pete is holding is a knockoff brand bottle labeled "Cerveza" that appears to resemble a bottle of "Corona." "Cerveza" is the Spanish word for beer.
During the closing credits of TGS, the last two writers are listed as 'Ricky' and 'Ronnie'. This is a reference to Studio 60 on the Sunset Strip, Aaron Sorkin's show with a similar premise to 30 Rock, in which two antagonistic lead writers are called Ricky and Ron. Both shows aired in the same year.
Frank's trucker hats say "Why" and "Bottom Feeder".
Before the title sequence, Liz says "OK. Season five... Here we go," referring to the fifth season of "TGS," but the line is self-referential since it is the first episode of season five of "30 Rock."