@sdas101
These advises are a little outdated with phpBB3 and our SEO tricks. Take a look at the demo server :
http://phpbb3.phpbb-seo.net/
The view latest post has become a text link using the topic url instead of the original post url, what was wrong is now good to keep.
For usernames, it's another debate, I personally think that profile can be indexed if your forum has enough topics, once adding the profile would not create a too big proportion of page with few content.
By default, profile are only available to registered users on phpBB3, and bots do not see user profiles links.
@BFTUK
Indeed it looks like you are using SMF, with some issue with stylesheet apparently, I cannot see any style applied to the forum right now.