Adesso mi appaiono questi errori:

31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] serial@/dev/tty.usbserial-XBPWO3NPB:57600
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] net.tinyos.packet.Packetizer@e56328
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] Exception in thread "Thread-99" java.lang.NoClassDefFoundError
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.comm.NativeSerial.getTOSCommMap(NativeS erial.java:207)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.comm.TOSSerial.<init>(TOSSerial.java:28 2)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.packet.SerialByteSource.openStreams(Ser ialByteSource.java:56)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.packet.StreamByteSource.open(StreamByte Source.java:51)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.packet.Packetizer.openSource(Packetizer .java:139)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.packet.AbstractSource.open(AbstractSour ce.java:69)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at net.tinyos.packet.Packetizer.open(Packetizer.java: 132)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at daniele.clienteSF$Ascoltatore.run(clienteSF.java:1 38)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at java.lang.Thread.run(Thread.java:613)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] Problemi di connessione!
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] java.net.BindException: Address already in use
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at java.net.PlainSocketImpl.socketBind(Native Method)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at java.net.PlainSocketImpl.bind(PlainSocketImpl.java :359)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at java.net.ServerSocket.bind(ServerSocket.java:319)
31/08/09 10:06:13 [0x0-0x19019].com.apple.Safari[193] at java.net.ServerSocket.<init>(ServerSocket.java:185 )

Ho aggiunto agli archivi anche il file di prima: tinyos.jar
Contiene dei metodi utili alla mia applet. L'ho dovuto aggiungere alla libreria di java per poter eseguire correttamente la mia applet, non so se è necessario che sia inclusa anche qui.