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You mean, on each row of the members’ Activity, their Wall ? My immediate answer is “no”…
The Activity items are displayed directly by WP Symposium, so I had a look at how they are built, and there’s no hook or anything. We could ask Simon (dev of WPS) to add one. But then, the WP comment id is missing as well…

Or do you mean, as a menu item in the WP Symposium Profile page, that would list all comments raised by the member?

Hmm, let me try one or two things and see if I can come up with a little something.

May I stress however, that those rows would look different from the others at the WPS Activity page?

Simon has kindly added the needed hook to WPS, so I’m working on the option to show the text of a post or comment (its beginning) to the next release of the plugin. The option will count the #characters and round to the next word instead of truncate. By trial-and-error you should be able to determine which setting best fits one row without wrapping…
I wish I could edit my previous reply to this thread: rows activity are all showing different information, hence all look different. Plus it’s nice to see what was written or commented before clicking, as you pointed out already. Thanks for your request, nice addition to the plugin!