  Dark matter currents in the large-scale structure give rise to
gravitomagnetic terms in the metric, which affect the light propagation.
Corrections to the weak lensing power spectrum due to these gravitomagnetic
potentials are evaluated by perturbation theory. A connection between
gravitomagnetic lensing and the integrated Sachs-Wolfe (iSW) effect is drawn,
which can be described by a line-of-sight integration over the divergence of
the gravitomagnetic vector potential. This allows the power spectrum of the
iSW-effect to be derived within the framework of the same formalism as derived
for gravitomagnetic lensing and reduces the iSW-effect to a second order
lensing phenomenon. The three-dimensional power spectra are projected by means
of a generalised Limber-equation to yield the angular power spectra. While
gravitomagnetic corrections to the weak lensing spectrum are negligible at
observationally accessible scales, the angular power spectrum of the iSW-effect
should be detectable as a correction to the CMB spectrum up to multipoles of l
\~ 100 with the PLANCK-satellite.
