Fantagraphics announced that there will be a new series of books, beginning this fall, that will collect POGO in its entirety. Jeff Smith will design, and the cover that's reproduced is pretty much the final design.
POGO is just one great American strip that is getting reprinted. We're deluged with a lot of great material now. Just off the top of my head (and with help from the Fantagraphics "Flog" blog), here's a list of available hardcover books reprinting newspaper strips:
LITTLE NEMO IN SLUMBERLAND
DENNIS THE MENACE
LITTLE ORPHAN ANNIE
And there's more coming up.
If you like old newspaper comics, here are a few sites of interest:
Coconino World is a huge site, in French and English, that celebrates a lot of classic cartoonists. If you go to this page, you can start looking at Swinnerton, McManus, etc.
Shane Glines' Cartoon Retro (subscription only), celebrates classic cartoon illustrators. Lots of stuff here. Join up for a month. I did.
Andy's Early Comics Archive is an incredible collection of cartoons through the centuries with tremendously large scan for much oohing and aahing. I love the page of photos and caricatures of cartoonists here.
Craig Yoe's Arf Lover's Blog is a wonderful collection of cool stuff. I always wind up spending time looking at old gag cartoons, old comics and other items of delight that Craig has.
Stripper's Guide by Allan Holtz is not as racy as it sounds. Lots of great old comic strips here.
Barnacle Press is a trove of old features from the comics pages.
Arnold Wagner's Cartoonology always has the insider stories about cartooning and comics.
Leif Peng's Today's Inspiration blog tends to be more about post-war illustration, but the site is such an interesting place to visit and it's full of vintage material, that it's worth a looksee.