my other trick i use sometimes is to abs(cos(latitude)) as many points in each "row" rounded to a power of 2. it's fun to use the bitwise operations to do that one :-D - I'll put together a quick example of that grid too.
the benefit is it's a strict subset of the {lat,lon} lattice which can have computational benefits - but nowhere near as pretty as the phyllotaxis
thanks for the great suggestion to separate the geometry from the data - merged!