Eric
I believe the small spider is what is called the common house spider.
Here is what Wikipedia says about the spider -
"These spiders are not aggressive. They are not known to bite people frequently, nor is their venom known to be dangerous to human beings. When removed from their webs their poor vision and body type renders them helpless. Their only concern seems to be to find and return to their own web or build another one. They do not wander around inside houses except to find a secure place to build a web. Since these spiders are harmless and their diet consists of pests such as flies and mosquitoes, as well as other small invertebrates found in houses, tolerating their presence in human homes is beneficial."
And here is the website if you want to read more-
http://en.wikipedia.org/wiki/Parasteatoda_tepidariorum
The second dark brown spider might be a Sheetweb Spider. I am not very good at spider ID and do not know my spiders well at all. Since many spiders come into our homes by accident...it could be one of several types.
Yours kind of looks like this genus...what do you think - http://bugguide.net/node/view/50823/bgimage??
Spiders are beneficial, feeding mostly on small insects and other arthropods. So it is best to move them outdoors out of your way, or you could leave them to catch other insects in your house.