CraftBukkit version 1000 is for 1.7.3. You can find this on the homepage on the right-hand side navigation bar. The Bukkit API can be found by clicking on "Documentation" on the top navigation bar and scrolling down and clicking on "Bukkit API - For Developers" under "Latest Downloads" on the Wiki.
Do you have any interest in working on a plugin for a specific server with a small team of people? If so please contact me at dested@gmail.com and we can talk more.
