I can't say I was surprised when this hit the ether:
I guess the only thing that was remarkable (for those of us closeted comic book fans of old) was that Marvel Comics took this long to bring him back. After Superman's death, DC Comics waited only a year to bring arguably its greatest hero back to life--heck, they even brought back the supervillain that killed him Clark Kent's alter ego now many times over.
Marvel marked over two years since this super-hero's assassination before announcing the hero's return for next month. My estimation is they needed a certain level of clamor before bringing the guy back. And, given the general success of comic heroes in film right now (plus the continued buzz of an Captain America movie, and a later Avengers movie down the line), having a currently dead icon in comic book print just wouldn't do.
I'm happy to see him back, but CA was never at the top of my list of comics I had to gobble up in my youth. I liked him, but not in the same vein of Spider-Man, Batman, Wolverine, Green Lantern and Iron Man when I was young (guess I like them more flawed). I mentioned his return to my son after I heard this today. "Captain America is dead?!?", was his response. Either my 13 year-old needs to get out more, or Marvel could have waited longer.