We report evidence for two previously unidentified effects in the ionization
of rare-gas clusters by intense extreme-ultraviolet pulses. First, electron
spectra indicate multistep photoemission with increasing isotropy for larger
clusters due to electron-atom collisions. Second, very slow (meV) electrons
are interpreted as the first experimental evidence for Rydberg-like atomic
state formation in the nanoplasma expansion. Only small fractions of Xe2+ ions
were found, in sharp contrast to previous results recorded under comparable
conditions [Murphy et al., Phys. Rev. Lett. 101, 203401 (2008)]