The other problem with this design is maintenance. If you have posted your index thread, and time goes by and new threads are created which would add value to your index list, there are only two ways to ensure it gets added.

One is that an "owner" or an industrious volunteer recognizes the appropriateness of the additional material and adds it by hand to the index thread.

The other way is that somewhere within the new thread, someone sees that it should be part of an index thread (because it is the kind of stuff that will want to be brought up recurringly) and inserts a delimited index keyword into the thread. For example, such a keyword might look like:

##index:busk## or ##index:guitar_models##. A spider could do the work of adding the hooks to the index thread by scanning the days add'l material overnight and looking for ##index:x## and parsing the name of th eindex topic out, and appending the new thread's URL to the index thread in the appropriate way.

Such an approach would leave it open to all to decide that a given thread should be added to an index, and if no-one bothered with it it would not get so added. The only labor added once the spider was written would be occasionally having to de-index wrongly included threads which were marked by mistake or for nuisance power. Event hat could be worked-around.

A