Litgal has finished part three in the Not in Kansas Anymore story series with the tale Lions and Guides and Igigi, Oh My
and I really enjoyed it! This is a crossover between NCIS, Stargate Atlantis, and SG1 that has introduced a new symbiotic species called the Igigi into the mix. This story has also dealt more with the wraith as well. Here's her summary for the story:
With John back at the helm, Atlantis is developing into a thriving city-state. However, the Wraith are still a threat. When Todd and Michael and the other Wraith characters start making their appearances, the ability of the Igigi queen to communicate on their level changes everything. For example, other Wraith do have a name for Todd--Guide of Old. Oddly, Wraith give Colonel Sheppard the exact same name.
Another great story, you should go check it out!