They'll lock your thread for peer to peer messages.
And by the way, they infect your mp3 players with spyware, which can lock them up and break them, i've seen enough returns. Don't do it.
THE ARCHOS MPA430 IS GREAT. IM THINKING ABOUT GETTING ONE. DOES ANYONE KNOW IF ITS POSSIBLE TO DOWNLOAD MUSIC PROGRAMS SUCH AS LIMEWIRE ON IT AND BE ABLE TO D/L VIDEO & WATCH IT ON IT?