16 Apr 07
Even though his analysis is often incomplete and the proofreading is typically bad, Eric Schiller's "Gambit Opening Repertoire for White" and "Gambit Opening Repertoire for Black" give interesting gambit ideas that you can play successfully if you're willing to do some work.
As White:
Goring Gambit: 1 e4 e5 2 Nf3 Nc6 3 d4 ed 4 c3
dc 5 Nc3
Halasz Gambit: 1 e4 c5 2 d4 cd 3 f4
Ulyesses' Gambit: 1 e4 c6 2 d4 d5 3 Nf3 de 4 Ng5
Tennison Gambit: 1 e4 d5 2 Nf3 de 3 Ng5
Alapin Gambit: 1 e4 e6 2 d4 d5 3 Be3 de
As Black:
Hennig-Schara Gambit: 1 d4 d5 c4 e6 3 Nc3 Nc6 4 cd cd
Portugese Gambit: 1 e4 d5 2 ed Nf6 3 d4 Bg4
Icelandic Gambit: 1 e4 d5 2 ed Nf6 3 c4 e6 4 de Be6
Fun stuff!