As many of BHWer already said:
- Your IP does not matter when you are creating web 2.0 blogs. Though you may have some restriction in opening multiple account with same IP in one web 2.0.
- Use different user name/email address. Also keep blog title and blog name different in each.
- Do not interlink these blogs as it may cause more harm than good. Instead use pyramid style.
- Don't post just one article. Instead make it 5-10 articles posted at different interval
- Do not put the same link from every post. Vary the number of anchor links (1, 2 or 3 maximum). If you are including 3 links, keep one link to external authority website
- Make few posts with no link or link only to authority website like wikis, about, ehow and so on
- Do not use default theme. Also change profile pics to make it look a genuine blog