In the full changelog for Wine 1.2 RC i found the following:
d3dx9: Add ps_3_0 instructions parsing to the shader assembler.
d3dx9: Shader assembler ps_3_0 support.
d3dx9: Add missing texkill instruction parsing.
d3dx9: Use separate opcodes for TEXLDP and TEXLDB.
d3dx9: Check for oCx register number.
d3dx9: Shader assembler vs_2_x support.
d3dx9: Add some more tests on register number checking.
d3dx9: Shader assembler ps_2_x support.
Does this mean that Pixel Shader 3, Pixer Shader 2 and Vertex Shader 2 are supported now. I really hope so.