In print: Your car's secret ingredient; Dave Sifry speaks; chip and pet; Lotus Notes - the story continues; the government's other ID scheme; and more

This week's print edition is, well, printed, and there's a broad range of topics to intrigue you.

• A sweet solution to fuel troubles
  If you filled up at Tesco recently, did you know you were putting bioethanol - made from sugar, not oil - in your car? It's the new eco-friendly component to fuel.. and could be the start of a revolution in garages across Britain. Ian Sample reports.
• A dog's dinner of a system
  Pet Passports are supposed to keep animals safe but are let down by compatibility issues.
• 'We are trying to make it better'
  Last week's controversial article on Lotus Notes drew heartfelt responses from administrators and users. We print an edited selection.
• The ringmaster of the blogosphere
  Technorati.com began as a case of 'scratching a personal itch' and has grown to be a vital tool for web watchers. Glyn Moody profiles Technorati creator Dave Sifry.
• Technobile
  Kate Bevan: Beware wizards - they will cast a spell of idiocy over your network and PC.
• Why government wants to give you a double identity
  Michael Cross: You wait ages for a national identity scheme, then two come along at once.
• Know your enemy - it's the only way to thrash him
  Keith Stuart: That videogame stalwart, the end-of-level boss, is back in fashion, so here's a simple, five-point guide to dealing with any troublesome boss.
• Frustrated author? Publish yourself
  Victor Keegan: Are books about to go the same way as music and videos, with everyone able to publish from their back rooms, cutting out all the agents in the middle?
• Read this week's letters
  Send your letters, comments, questions and rants to tech@theguardian.com, and please include your full name and post town - without them, we won't publish your comment.
• Ask Jack
  Send your questions and comments to Jack.Schofield@theguardian.com. Published letters will be edited for brevity, but include full details with your query. Visit the Ask Jack weblog for daily updates.
• Newly asked questions
  • Do Amazon and Google plan to rival the iTunes store?
    It would be surprising if they didn't launch music download stores.
  • Why is that robot helping to operate on my knee?
    Because it's more accurate than a human.
  • Will the PS3 have true high-definition games?
    Almost certainly not at the beginning - and perhaps not for a long time.
  • Gadgets
    Motorola's L6 phone: thin and beautiful, but not very useful | Kodak's V570: a compact camera that lets you see the bigger picture | Hercules DJ Control MP3: bedroom DJ mixer that is as simple as MP3