Greetings MMOwned. After downloading the WotLK alpha, and using Mike Crowe's Sandbox. I have found coords for new instances. I will be updating with any more that I do find. Also, note: these instances are not fully completed as we all know since this is alpha stage of WotLK.
1. The Nexus
.go 576 145.8741 -50.5538 20.1956
2. Utgarde Keep
.go 574 369.7720 25.3249 22.7549
3. Stratholme Past
.go 595 2101.9758 1287.5470 137.5465
4. Drak'Tharon
.go 600 -404.8349 -667.3640 26.6426
5. The Oculus
.go 578 1072.0948 1084.4731 601.8307
6. ???
.go 599 940.3112 375.4565 207.4192
Happy Exploring