Hans at Beautiful Beta took my customizable recent comments widget and added the date and the title of the post on which the comment was made! Not only that, he made it into an easily addable widget. I liked it very much and so I have used it in my sidebar. I would encourage you to try it as well. You can get it here.
He also has a customizable latest posts widget based on the same hack. In addition to the title, it shows a summary of each post. That's a nice idea too.