I think it would be helpful to add a "number of entries" column before the subject names. This would give some idea as to what is available under that title. For those familiar with the topic, it would indicate if there was newer material.

44  arrays
67  CGI programming
12  data formatting
72  database programming
nn  etc
[download]

If someone wanted to get carried away, there could be two numbers: number of questions, and total number of replies.

44  145  arrays
67  267  CGI programming
12   76  data formatting
72  521  database programming
nn  yyy  etc
[download]

-ted-