Habitat change over the past 50(?) years on the major mudflats along the Asia-Pacific Flyway (an airphoto/remote sensing project). A focus on Bohai Bay, and other parts of the Yellow Sea, China. Including the impliations for migratory wading birds that use the Yellow Sea. Great MS or even undergrad project!
The effects of weather on benthic invertebrates in Roebuck Bay, Western Australia. Primarily a stats project. Needs someone with both a biology and statistics background.
An examination of landuse (current and potential) within interstate median strips (largely a GIS/management project).
Developing a geospatial music application - spatially tagged music will play as you travel! Will require an individual with significant programming and database skills.
I'd like to see a project which examines peoples perceptions of scale, particularly examining images at both the macro and micro scales. Something similar to this project, though a research question will need to be defined.
Using GIS to help market and recruit for a university.
Ranking every county by scenery, climate, liveablilty, etc. Perhaps even an online version with MCDM weights. Like this, only way, way better
Or even something you've come up with and are interested in. Talk to me!