Included Sass files which should have been in my previous commit. Oops!

How embarrassing. Also I've updated the gitignore.

themes/classic/sass/partials/sidebar/_base.scss

@@ -0,0 +1,56 @@
+.side-shadow-border {
+  @include box-shadow(lighten($sidebar-bg, 5) 0 1px);
+}
+#articles + aside {
+  color: $sidebar-color;
+  padding-top: 1.2em;
+  text-shadow: lighten($sidebar-bg, 8) 0 1px;
+  section {
+    @extend .sans;
+    font-size: .8em;
+    line-height: 1.4em;
+    margin-bottom: 1.5em;
+    h1 {
+      margin: 1.5em 0 0;
+      padding-bottom: .2em;
+      border-bottom: 1px solid $sidebar-border;
+      @extend .side-shadow-border;
+      + p {
+        padding-top: .4em;
+      }
+    }
+  }
+  ul {
+    margin-bottom: 0.5em;
+  }
+  li {
+    list-style: none;
+    padding: .5em 0;
+    margin: 0;
+    border-bottom: 1px solid $sidebar-border;
+    @extend .side-shadow-border;
+    p:last-child {
+      margin-bottom: 0;
+    }
+  }
+  a {
+    color: inherit;
+    @include transition(color, .5s);
+  }
+  &:hover a, &:hover #tweets a { color: $sidebar-link-color;
+    &:hover { color: $sidebar-link-color-hover; }
+  }
+  #recent_posts {
+    time {
+      text-transform: uppercase;
+      font-size: .9em;
+      color: #666;
+    }
+  }
+}
+.aside-alt-link {
+  color: $sidebar-link-color-subdued;
+  &:hover {
+    color: $sidebar-link-color-subdued-hover;
+  }
+}

themes/classic/sass/partials/sidebar/_delicious.scss

@@ -0,0 +1,4 @@
+.delicious-posts {
+  a.delicious-link { margin-bottom: .5em; display: block; }
+  p { font-size: 1em; }
+}

themes/classic/sass/partials/sidebar/_pinboard.scss

@@ -0,0 +1,12 @@
+#pinboard_linkroll {
+  .pin-title, .pin-description {
+    display: block;
+    margin-bottom: .5em;
+  }
+  .pin-tag {
+    @include hover-link;
+    @extend .aside-alt-link;
+    &:after { content: ','; }
+    &:last-child:after { content: ''; }
+  }
+}

themes/classic/sass/partials/sidebar/_twitter.scss

@@ -0,0 +1,33 @@
+#tweets {
+  .loading {
+    background: inline-image('bird_32_gray.png') no-repeat center .5em;
+    color: darken($sidebar-bg, 18);
+    text-shadow: $main-bg 0 1px;
+    text-align: center;
+    padding: 2.5em 0 .5em;
+    &.error {
+      background: inline-image('bird_32_gray_fail.png') no-repeat center .5em;
+    }
+  }
+  a { color: $sidebar-link-color-subdued; @include hover-link; }
+  p {
+    position: relative;
+    padding-right: 1em;
+  }
+  a[href*=status]{
+    color: $twitter-status-link;
+    float: right;
+    padding: 0 0 .1em 1em;
+    position: relative; right: -1.3em;
+    text-shadow: #fff 0 1px;
+    font-size: .7em;
+    span { font-size: 1.5em; }
+    &:hover {
+      color: $sidebar-link-color-subdued-hover;
+      text-decoration: none;
+    }
+  }
+  a[href*='twitter.com/search']{
+    @extend .aside-alt-link;
+  }
+}