Web 2.0 sites are a very good platform to make free blogs and build high quality backlinks for your site. Web 2.0 sites are crawled by search engine spiders very frequently and they index its new blogs also very quickly. There are a very very popular link building method that is called as link wheel which can be made effectively by web 2.0 sites. I have got a good list of web 2.0 sites where you can make your free blogs and also make link wheels. It will go according to your need.
| Web 2.0 Sites | Page Rank |
|---|---|
| Wordpress | 9 |
| Myspace Blog | 9 |
| Blogspot | 8 |
| Weebly | 8 |
| posterous | 8 |
| Livejournal | 8 |
| Tumblr | 8 |
| My Opera | 8 |
| Squidoo | 7 |
| Wikidot | 7 |
| Webnode | 7 |
| Webs.com | 7 |
| Wikispaces | 7 |
| Multiply | 7 |
| Tripod | 7 |
| Jimdo | 7 |
| Zoho | 7 |
| Yola | 7 |
| zimbio | 6 |
| Hubpages | 6 |
| Blog.com | 6 |
| Gather | 6 |
| Xanga | 6 |
| Wikia | 6 |
| blog.co.uk | 6 |
| EN OverBlog | 6 |
| Podbean | 6 |
| SkyRock | 6 |
| FC2 | 6 |
| Wetpaint | 6 |
| friendster | 6 |
| Instablogs | 5 |
| SOSBlog | 5 |
| OnSugar | 5 |
| Thoughts | 5 |
| zoomblog | 5 |
| Blinkweb | 5 |
| Insanejournal | 5 |
| Beep | 5 |
| Flixya | 5 |
| Mytripjournal | 5 |
| Blogetery | 4 |
| Blurty | 4 |
| Inube | 4 |
| TravelBlog | 4 |
| indyarocks | 4 |
| blogster | 3 |
I have personally worked on every single of those and they all are free and 100% working. Some sites may have paid option but they have got free option too. You can use the free option if you do not want to pay. Make a comment you have liked this list or if you have any suggestion for me.
