It sounds like you are looking to find a comment you made. Use the Wall Filter feature located at the top of the wall. It looks like this:
Use the filter "My Wall Posts". This filter will display all wall posts you have entered. It will also display comments that other members have left on those wall posts. Even though it will only display two comments at a time, you can always click on "more" below the last comment to display all comments.
You can also use the filter "Replies to my posts/comments" - This will display wall posts that you have made that have comments. I can tell you this tool is one of my favorites! It's a great way to keep the conversation going and not miss anything.
To find press releases, use the filter "Press Releases" - Using this filter you will see all the recent press releases that were published making it easy not to miss anything! This filter will also make it easy to find the press release you just commented on.
Hope that helps! For more training and tips, make sure to take the free IBOtoolbox lessons at MarketWithKris.com