Just go to http://en.gravatar.com/ and register your email address that was used for registration on this forum and upload a picture. This will enable your avatar for every WordPress blog (that has gravatar enabled), every bbpress forum and many others. Just make sure you use the same email, otherwise the magic will not work.
1. Click on your name on the top left (where it says Welcome .... !).
2. Click on the edit button under the NikonRumors Forum title or just click on the link "edit this information".
Edit already posted comments:
I changed the edit post function - now you can edit your posts up to 24 hr after posting it, after that the edit button will disappear.
If you have any other questions/suggestions about this forum, please enter them here and I will try to resolve them asap.