AOLserver has a larger set of socket type commands, although the exact state of usefulness is not very easy to figure out. Also notice that there is ns_http and ns_https (via nsopenssl), which can easily handle http requests.
If you want a good idea of the AOLserver ns_sock+ functions, look at how they are used in ns_https for some ideas.
I have some old web pages of these ns_sock+ commands which have examples that were removed from the version you reference above:
http://rmadilo.com/files/nsapi/
Another more complete example using some of these commands is here:
http://rmadilo.com/m2/servers/rmadilo/modules/tcl/twt/packages/tclbean/tcl/
I'm not sure what you are trying to do with the scheduled proc, or how that relates with ns_conn, but if you want to run something after the client connection finishes, you can schedule a trace filter, or use ns_atclose, which requires an ns_conn. ns_atclose is guaranteed to run regardless of any errors prior to the connection close. If you are trying to run code during the client connection, you should look at ns_proxy which is designed for this type of thing.