Nice guide! I also use iBus when I use linux, but I opt to use Mozc instead of Anthy.. If I remember correctly, Anthy had an odd incompatibility with Skype, so I gave up on Japanese on Linux for a while.

Recently I installed a fresh copy of Linux Mint and discovered Mozc. Mozc is an IME based on Google’s IME, which is my IME of choice on Windows and Mac. (though maybe I may try Mozc on Mac since it’s supported…). Check it out here:
http://code.google.com/p/mozc/

Take a look at what Koichi had to say about Google IME if you’re not familiar with it:
http://www.tofugu.com/2011/02/16/google-japanese-ime-for-better-typing-in-japanese/

I’m unsure how Anthy compares, but I do know that Mozc DOES work with the Linux version of Skype (without flaw too).