How about adding support for .frag and .vert files? This is the standard file extension for GLSL shaders. Even better would be GLSL syntax highlighting.
This could be easily added in future versions, when the SDK matures a little bit more. I'm working in this direction with the SDK. I would like BLIde to be able to parse, hilite and provide intellisense for any kind of file using plugins BLIde users will be able to code. I have a little intellisense test based on LUA working ok, but not finished yet. I'll provide more feedback on this soon.