I update this on page 4 of the thread. There is a link at the end of the main post on page 1 to it.
Latest and greatest.
As of 5/14/14
89 Omnibus titles have been released to date. 40 titles are currently Out of Print with another 13 titles getting close. Good news as the Alias Omnibus will be coming back into print in September 2014.
For the 14 titles that are getting close to going Out of Print I have listed sites that still have them in stock. You can also still find deals for them on Ebay and Amazon Marketplace.
Use this very helpful guide to know what issues are in each omnibus, cost per page, which era etc...
http://crushingkrisis.com/collecting...ibus-editions/
Out of Print
Alias Omnibus - Coming back in print (September 2014)
Silver Surfer Omnibus
Amazing Fantasy Omnibus
Devil Dinosaur Omnibus
Eternals Omnibus
Howard the Duck Omnibus
Daredevil Omnibus Companion Frank Miller
Daredevil Omnibus Volume 1 (Bendis)
Daredevil Omnibus Volume 2 (Bendis)
Daredevil Omnibus Volume 1 (Brubaker)
Daredevil Omnibus Volume 2 (Brubaker)
Elektra Omnibus
Tomb of Dracula Omnibus Volume 1
Tomb of Dracula Omnibus Volume 2
Punisher (Ennis) Omnibus
The Ultimates Omnibus
Iron Man Omnibus Volume 1
X-Men Omnibus Volume 1
Wolverine Omnibus, Volume 1
Captain Britain Omnibus
Immortal Iron Fist Omnibus
The Death of Captain America Omnibus
Thor Omnibus Volume 1
Captain America Omnibus (Brubaker)
Astonishing X-Men Omnibus
Iron Man Omnibus Volume 2
Ghost Rider Omnibus
Thor (JMS) Omnibus
Thor Walter Simonson Omnibus
Captain America Omnibus Volume 1
Secret Wars Omnibus
Secret Wars II Omnibus
Hulk Omnibus Volume 1
Acts of Vengeance Omnibus
X-Men: Age of Apocalypse Omnibus
Spider-man Omnibus Volume 2
Secret Warriors Omnibus
Captain America Lives Omnibus
Untold Tales of Spider-man Omnibus
Spiderman MacFarline Omnibus
Almost Out of Print
Golden Age of Marvel Omnibus Vol. 1 * (CGN, TOW & IST) * (Direct Market cover sold out)
Woman of Marvel Omnibus (TOW, IST) * (Direct Market cover available)
Captain America Omnibus by Jack Kirby (Amazon)
X-Men Omnibus Volume 2 * (Amazon) * (Direct Market cover sold out)
X-Men Claremont / Lee Omnibus Volume 1 * (CGN) * (Direct Market cover sold out)
Tomb of Dracula Omnibus Volume 3 * (TOW) * (Direct Market cover available CGN, TOW, IST)
Evolutionary War Omnibus (CGN, TOW, IST) * (Direct Market cover sold out)
Squadron Supreme Omnibus * (CGN, TOW, IST) * (Direct Market cover at CGN)
Iron Man Omnibus Layton/JRjr (Amazon, TOW, IST) * (Direct Market cover sold out)
Atlantis Attacks Omnibus * (Amazon. TOW, IST) * (Direct Market sold out)
Punisher Omnibus (TOW, CGN)
Ulitmate Spider-man Omnibus Volume 1 * (CGN, TOW, IST) * (Direct Market cover sold out)
John Carter: Warlord of Mars Omnibus * (TOW, IST) * (Direct Market cover sold out)
Instock everywhere (includes Amazon - Barnes & Noble)
Acts of Vengeacne Crossovers Omnibus * (Direct Market cover available at IST & CGN)
Wolverine Jason Aaron Omnibus
Dark Tower Omnibus
Fantastic Four John Byrne Omnibus Volume 1 * (Direct Market cover available at CGN, IST,TOW)
Avengers Volume 1 Omnibus * (Direct Market cover available at CGN)
X-Statix Omnibus
X-men Claremont / Lee Omnibus Volume 2 * (Direct Market cover sold out)
Ultimate Avengers Omnibus
Avengers: The Crossing * (Direct Market cover available at CGN, IST & TOW)
New X-Men Omnibus (2nd Printing)
The Stand Omnibus
New Avengers Omnibus Volume 1 * (Direct Market cover available at CGN, IST & TOW)
Marvel Zomnibus
Man-Thing Omnibus * (Direct Market cover available at CGN)
Ultimate Death of Spider-man Omnibus
X-Force Omnibus Volume 1 * (Direct Market cover available at CGN)
West Coast Avengers Omnibus Volume 1 * (Direct Market cover available at CGN, IST, TOW)
New Warriors Omnibus Volume 1 * (Direct Market cover available at CGN, IST, TOW)
Wolverine by Mark Miller Omnibus
Marvel Now Omnibus
Thor Omnibus Volume 2 * (Direct Market cover available at GCN)
Spiderman Omnibus Volume 1 (3rd Printing)
Iron Man by Kurt Busiek & Sean Chen Omnibus
Uncanny X-Men Volume 1 Omnibus (3rd Printing)
Fantastic Four Omnibus Volume 1 (3rd Printing)
Fantastic Four by Jonathan Hickman Omnibus Volume 1
West Coast Avengers Omnibus Volume 2 * (Direct Market cover available at GCN, IST, TOW)
Daredevil Omnibus Frank Miller (2nd Printing)
Fantastic Four Omnibus Volume 2 (2nd Printing)
Fantastic Four John Byrne Omnibus Volume 2 * (Direct Market cover available at CGN)
Deadpool Omnibus * (Direct Market cover available at CGN, TOW & IST)
Golden Age of Captain America Omnibus * (Direct Market cover available at CGN, TOW & IST)
Uncanny X-Force Omnibus
Spider-Man by Roger Stern * (Direct Market cover available at CGN)
Uncanny X-Men Omnibus Volume 2 * (Direct Market cover available at CGN)
Annihilation Omnibus