I read quite a bit of web 2.0 tutorials. My goal is rank 10 keywords (they are different but in same big niche). 1, since I have several keywords to rank, should I build 5-10 web 2.0 for each KW? Since they are all in one big category, should I just build 5-10 web 2.0 in total and link to different KW page? 2, do I need to use tier 2? Is is safe and effective to just use tier 1? This is a long term site that with great ranking for some keywords, now I'm trying to rank the rest KW. This is definitely not a chunk burn site. 3, should I use expired web 2.0 or register brand new ones? 4, Do you have some good web 2.0 tutorials? The ones I read are explain kinda differently. 5, If there are any services you can recommend, I will really appreciate it!