Well, I managed to compile avcimport on OSX, and have attempted to import the binaries that result from this tool. Here is sample output of importing with v.in.ogr:
GRASS 5.7.-cvs:~/Research/INLAS/GIS > v.in.ogr dsn=roads output=roads
Layer: aat
WARNING: 32064 features without geometry.
Layer: bnd
WARNING: 1 feature without geometry.
Layer: nat
WARNING: 31297 features without geometry.
Layer: pat
Layer: ratmatrix
WARNING: 1 feature without geometry.
Layer: rd_matrix.cen
WARNING: 14495 features without geometry.
Layer: secmatrix
WARNING: 32066 features without geometry.
Layer: tic
WARNING: 456 features without geometry.
-----------------------------------------------------
0 primitives registered
0 areas built
0 isles built
Number of nodes : 0
Number of primitives: 0
Number of points : 0
Number of lines : 0
Number of boundaries: 0
Number of centroids : 0
Number of areas : 0
Number of isles : 0
Trying to display the resulting layer gives a blank screen!
--
Christopher J. Fonnesbeck ( c h r i s @ f o n n e s b e c k . o r g )
Georgia Cooperative Fish & Wildlife Research Unit, University of Georgia