My plan is to call an external script (in
~~bin) which will do the brunt of the work. This script has to be
generated by the configure script so that it calls up the correct
browser for the system.

Nah, this script has to use a Scheme variable (or an environment variable) to select the browser or the command to run.
Setting it to firefox may just be the right default value, and others will call w3m or whatever as they want it.
Deciding what to run at compile time of gambit is useless work.

Also, looking at slime may be nice, the hyperspec integrates quite well (should it be or not installed locally).
Can the wiki be fetched dumped on a parsable format on a local machine (say, HTML)?

P!

--
Français, English, 日本語, 한국어