I totally missed it, but it looks like the TPB for Marvel's 'Secret Invasion' finally came out last week! This was their big 'event' series for 2008, where everybody's favorite shape-shifting alien race, the Skrulls, secretly infiltrated every super-powered organization on Earth with one goal - full-scale invasion of the Marvel Universe!
I've purposely kept from reading any of the articles on it in Wizard magazine or wherever, so I could enjoy it as much as possible when it came out in collected form. Brian Bendis and Francis Yu look like they really let loose w/ a fun, yet expansive body of work here!
The story arc crossed-over a good majority of their titles, but this dilly just collects the actual 'Secret Invasion' comic #1-8. Should be available at your local comic shop, maybe even the big box guys.