I only have Interlude. The only area that I saw that offered web enhancements was the Appendix 3: Continuing the adventure. There seem to be three that use the password from this book and one from the larger book from 2002. I'd love anything they put out for this adventure. I'd suspect that there might be different stuff, but I wouldn't want to put you out. Thanks for your response.
The way Interludes was put together reminds me of why some of the older modules like T1-The Village of Homlet continuously show up in forum discussion.