Every time you modify a post slug, add a new post, rename a category, or otherwise modify any of your post and page permalinks, jadedcoder Sticky Permalinks (jcsp) will keep a copy of the original permalink along with the post or page it originally led to. If anyone tries to access the old URL, they will be redirected right to the new one, no matter how many times you’ve changed it.
If you re-use a URL that has already been used in the past, its copy will be replaced and it will safely link to the new article instead.
Don’t throw away valuable URLs! This plugin lets you re-organize your site as many times as you want, without risking traffic loss.

jadedcoder Sticky Permalinks

Keeps a history of your permalinks no matter what changes you make on your site, and redirects old links to the new ones.

paulmac

Uses a short javascript to remove any containing frames around your WordPress site. The Digg toolbar now adds frames to sites, affecting site owners traffic stats and SEO. Using “WP Frame Breaker” will force your site out of the Digg containing frame.

WP Frame Breaker

Adds a short javascript to your blog header to break out of any containing frames

jadedcoder Sticky Permalinks vs WP Frame Breaker