Amber's links, author Scott Sigler discusses his attempt to bum rush Amazon, and Jason Fried of 37Signals announces Highrise - a group contact manager. * G4 has acquired TWiT.TV. Actually; April Fools! * Google has a couple April Fools jokes. First, sign up for Google TiSP: a free in-home wireless broadband service using fiber optic via your toilet. Secondly, they introduced Gmail Paper. Let Google print out your Gmail! * Facebook launched LivePoke on April Fools day, "Facebook will dispatch a real live person today to poke a friend of your choice." * Is Mark Zuckerberg leaving Facebook? Or is it just another April Fools joke? * Amber recently did a story on Twitterholic: a site that lists the top 100 followed Twitter users. * Bum Rush the Charts was the idea that tho