Dr. Dobb's Journal is going eco-friendly (eco- in ecology, as well as eco- in economy) by going web-only so I guess you can hang on to the last print edition of Dr. Dobb's Journal - it might be worth something (with all the stuff on eBay these days, who knows?) :-P
PC Magazine is going web-only too! After you've been served the January edition of PC Magazine, there won't be any more of the print editions of PC Magazine.
The idea of having a web edition seems great, mostly because you can get timely news. With a print edition, you have to wait till the next issue to read about current happenings.