A button or tab we can click to say thanks, With the Thanks flagged up to show you as a member has said thanks would be useful.
A lot of conversations over this site are relevant to every member, rather than chiming into the conversation, you should be able to click a "Thanks Button" it will indicate you have acknowledged the conversation, and that the info within has been helpful. It also stops you from feeling like you crashed the party.
A simple way to Acknowledge something posted rather than typing would be great because us members don't know every member, but want to say thanks for their contributions here.
Hope this makes sense.