Well, I've seen a few home remedies for this. I'm not sure how effective they are, I'm looking for the answer myself at the moment. A large collection suggests chestnut or chestnut oil at the location of entry (go figure). Lemon oil mixed in with water as a spray and in cleaning supplies is also recommended. Personal observation states that a colder house will have less spiders (recently tested and proven) and that less clutter around the house forces them into the open for extermination.
A spider-based deodorant is currently in the final stages of development by an Australian company called Miss Meniscus.
It is called Bascule, and is being hailed as a breakthrough in the science of personal hygiene. It is based on venom extracted from genetically-modified Sydney funnel-web spiders. It works on the sweat glands by a neuro-suppressing process.
Test subjects are not generally named publically, but it is known that a famous singer has been using this deodorant for over a year without ill effect.