Filed under: Features, Web services, web 2.0
Weekend Web 2.0 roundup for December 16th

Booktagger is a type of social network for book lovers. Sign up and add the books you have read, and ones you are thinking about reading. Then chat it up with people that like the same books as you do, get suggestions and a little more insight on what you might want to read.
With Halloween fast approaching, it's a great time to get in some practice defending your territory against zombies. In Graveyard Shift, you take aim at zombies and other creepy-crawlies, blasting them into splatters of cartoony green guts. It's a casual first-person shooter, and it's very easy to get the hang of - use the mouse to aim, click to fire. Graveyard Shift has at least 15 levels, and it might even have some secret stages I haven't unlocked yet.
They key to getting good at Graveyard Shift is learning to use ...
