This guide has a lot of potential. A few things you should know:

• BBCoding is your friend! No one wants to read a guide that doesn't look good. Yours looks okay, but it could be drastically improved. Check out this guide to BBCode to learn some great tips.
• Fix your item build. It's a much better idea to have several different purchase orders in the guide, and title them different things such as "starting items," "mid game items," "situational items," etc. This helps organize your build so people can follow it more easily.
• There are several spelling and grammar errors in your guide. This might not bother some people, but it bugs the @#$% out of me.
• As Jakesty mentioned in a previous comment, you should have more than three sections in your guide. It's good to have a more in-depth guide so people can learn how you play him, not just the items you buy.

The build looks pretty good overall. I really like your masteries especially. I get into a rut of putting 21 points in one tree and 9 in another, but your 10-20-0 page looks really good for Amumu.

Keep up the good work! This guide is definitely a diamond in the rough, but with a little polish you can make it shine!

This is a nice guide that I enjoyed reading, it does however have a lot of flaws.

To start with your guide doesn't look all that amazing but that's alright since it's your first guide. I suggest making a seperate guide that is published, and just trying to figure out how to use BBcoding.

My second dislike is how you're build doesn't make him that tanky. Amumu is supposed to be a tanky team fight initiator and with this build it's just not going to happen. But I know that's not what you're going for so I think it's ok so don't bother changing it in that sence.

Thirdly, you currently only have 3 sections you wrote about; Items, Skill Sequences, and Runes. Since this is a jungle Amumu guide, you should definately write a jungle path section, a section on how to gank successfully, a mastery section, and tips on team fights.

Just as a side note on that nurf thing you spoke about, I know how you feel :(. My favourite champ to play Nidalee got nurfed and I don't like it.

Overall it's still a great guide that I enjoyed reading so it's a +1 from me :).