reg fees max..
There are tooooo many extensions and more will be coming up.. So keywords will be available in one extension or other. Too much competion, NO REAL sites on most of them. ALL of them looking to sell..
The only extensions users will remember are .COM and local country extensions (.de, .in, .co.uk etc). Rest will eventually be useless..
Also .BIZ is far better than .BZ as google treats .biz quite well relatively.