Puffi ami yumi? Never heard..
My sling isn't anything special really, just a piece of duct-tape reinforced 'leather' and two cords. Not really sure about the material. Some synthetic stuff. I used to have a wooden handle too, but I found a fingerloop better once I tried it.
As for what anime and manga series I'm into... Oh man there's a ton and some tons more of those. My recent favourite is Eureka Seven that contains hoverboarding mechas, two lasses with odd hair color and in my opinion a great story too. I still haven't seen any E7 dvds being sold in Finland though.
Currently I'm watching: Black Lagoon, Blood+, Ergo Proxy, Monster, School Rumble Second Semester, xxxHOLiC, Yakitate! Japan, Ouran High School Host Club, Night Head Genesis, Sergeant Keroro, Zero no Tsukaima, Utawarerumono and Innocent Venus. That's right, 13 series at once.
Luckily or unfortunately most of the subs pop up pretty scarcely so I can watch it all and have time left for other things too. I'm collecting just three manga series now and those are xxxHOLiC, Yotsuba&, and Rozen Maiden which has these german made dolls that beat the snot out of each other to get some rings and become Alice, the überdoll or something. And that's utterly awesome if anything ever was.