Cirrus needs to get approval fron the FAA for that additional weight increase and that is expected in late 2000.
I have a little info from Cirrus on this - there has been quite a bit of progress on this front, and Cirrus still hope to have the gross weight increase in place by the end of the 3rd quarter, but like anything it could slip. The end of the year seems certain, however.
The process is slow simply because almost every aspect of certification has to be re-examined, although the biggies, like the airframe structure and the parachute, are ok because tests were done at higher weights in anticipation of the SR22.
In fact the gross weight increase work is being done in conjunction with the SR22 development, which probably slows it a little, but avoids Cirrus having to duplicate work.
But, there seems no doubt that by the end of this year, there will be a gross weight increase, retrofittable to existing planes, of between 150-200 lbs, involving a paperwork change, and possibly some minor parts, e.g. it seems likely that the seats will need some foam replaced.
The CG envelope will also be expanded - the current envelope does not represent any limits of the plane, just the limits of what was demonstrated during certification. I gather that with the 3-blade prop and two big guys in the front seats, the CG can be forward of the limit.