The full trip report including photos for the 2011-07-05 trip is here:
There are a total of 5 peaks along the Needles / Lynn Ridge with the most direct approach for all being from Hydraulic Creek. The generally recognized main summit of Lynn Peak is the one immediately south of the Hydraulic Creek drainage (the north peak). The one immediately beyond the viewpoint at the top of the Lynn Pk trail is referred to as "South Lynn Peak" on bivouac.com.
I would propose that "South Lynn Peak" be added to the Bagger List.
Locations of the 5 summits (bivouac.com) from south to north are:
49.3850-123.0178 South Lynn Pk
49.3953-123.0147 Lynn Pk
49.4056-123.0144 South Needle
49.4097-123.0142 Middle Needle
49.4142-123.0144 North Needle
Here's a map identifying the summits and route from Hydraulic Creek: