According to CSS2, adding quote marks to any blockquote automatically, should be pain free. The spec handles it in such a way as to be entirely language independent – negating hard coded quote marks and allowing simple style sheet changes.
Social Media Mashup provides a widget and template tag to display a combined social media & RSS stream. A simple options panel and minimal CSS make this plugin easy to install and visually compatible on any WordPress site.
From time to time clients will send you some content that is in all CAPS. When that happens here is a good tool to get around retyping everything or using CSS to fix it.