Some might have heard lately that fluid simulations in Blender are getting a new major feature - Fluid Control (also known as 'Magic fluid control'). Nils Thuerey developed the code and Daniel Genrich (Genscher) works on the integration and small fixes/enhancements.
Theres been some good progress lately and the first build is now up on graphicall.org for bug testing.
The 'experimental' build can be downloaded from here. (note that at this stage only a windows version is available)
Linux version now also available (thanks to ibkanat)
There was a popular video a while back demonstrating fluid control that some people might not have seen. You can view it on youtube.