diff -ru sane-frontends-1.0.14-orig/src/progress.c sane-frontends-1.0.14/src/progress.c
--- sane-frontends-1.0.14-orig/src/progress.c	2003-01-19 00:03:08.000000000 +0200
+++ sane-frontends-1.0.14/src/progress.c	2008-09-13 18:37:03.000000000 +0300
@@ -20,6 +20,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <sys/time.h>
 #include <gtk/gtk.h>
 #include "progress.h"
 
@@ -45,6 +46,7 @@
 
   p = (Progress_t *) malloc (sizeof (Progress_t));
   p->callback = callback;
+  p->firstTime = 0;
 
   p->shell = gtk_dialog_new ();
   gtk_widget_set_uposition (p->shell, progress_x, progress_y);
@@ -62,6 +64,10 @@
   gtk_widget_set_usize (p->pbar, 200, 20);
   gtk_box_pack_start (vbox, p->pbar, TRUE, TRUE, 0);
 
+  p->etaIndicator = gtk_label_new ("Time remaining: ?");
+  gtk_misc_set_alignment (GTK_MISC (p->etaIndicator), 1.0, 0.5);
+  gtk_box_pack_start (vbox, p->etaIndicator, FALSE, TRUE, 0);
+
   button = gtk_toggle_button_new_with_label ("Cancel");
   gtk_signal_connect (GTK_OBJECT (button), "clicked",
 		      (GtkSignalFunc) progress_cancel, p);
@@ -69,6 +75,7 @@
 
   gtk_widget_show (label);
   gtk_widget_show (p->pbar);
+  gtk_widget_show (p->etaIndicator);
   gtk_widget_show (button);
   gtk_widget_show (GTK_WIDGET (p->shell));
   gtk_progress_bar_update (GTK_PROGRESS_BAR (p->pbar), 0);
@@ -88,6 +95,40 @@
 void
 progress_update (Progress_t * p, gfloat newval)
 {
-  if (p)
-    gtk_progress_bar_update (GTK_PROGRESS_BAR (p->pbar), newval);
+  struct timeval tv;
+  int now;
+
+  if (!p) {
+    return;
+  }
+
+  gtk_progress_bar_update (GTK_PROGRESS_BAR (p->pbar), newval);
+
+  gettimeofday(&tv, NULL);
+  now = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+
+  if (p->firstTime == 0) {
+    p->lastTime = p->firstTime = now;
+    p->firstVal = newval;
+    return;
+  }
+
+  if (newval > p->firstVal && now - p->lastTime > 1000) {
+    char buff[40];
+    int remaining = (int) ((now - p->firstTime) * (1.0 - newval) / (newval - p->firstVal) / 1000.0 + 0.9);
+
+    p->lastTime = now;
+
+    if (remaining >= 3600) {
+      snprintf (buff, sizeof(buff), "Time remaining: %d h %d min", remaining / 3600, (remaining / 60) % 60);
+    } else if (remaining >= 600) {
+      snprintf (buff, sizeof(buff), "Time remaining: %d min", remaining / 60);
+    } else if (remaining >= 60) {
+      snprintf (buff, sizeof(buff), "Time remaining: %d min %d sec", remaining / 60, remaining % 60);
+    } else {
+      snprintf (buff, sizeof(buff), "Time remaining: %d sec", remaining);
+    }
+
+    gtk_label_set_text (GTK_LABEL (p->etaIndicator), buff);
+  }
 }
diff -ru sane-frontends-1.0.14-orig/src/progress.h sane-frontends-1.0.14/src/progress.h
--- sane-frontends-1.0.14-orig/src/progress.h	2000-11-10 08:33:25.000000000 +0200
+++ sane-frontends-1.0.14/src/progress.h	2008-09-13 17:41:55.000000000 +0300
@@ -24,6 +24,10 @@
     gpointer callback_data;
     GtkWidget *shell;
     GtkWidget *pbar;
+    GtkWidget *etaIndicator;
+    gfloat firstVal;
+    int firstTime;
+    int lastTime;
   }
 Progress_t;