If you want to exchange your house :
http://www.webhomeexchange.com.
San Francisco is one of the most touristy spots on the globe and the amount and variation of hotels reflect this. There is a hotel to suit anyone within San Francisco City and many easy to use search engines to find the perfect place for you. Prices and quality vary widely, so read up on previous guest's reviews so you may ascertain a pleasant stay.
You will find some interesting cheap hotels at http://www.usatourist.com
You will find discount coupons on stays in hotels on: http://www.roomsaver.com
To reserve a hotel you may use:
For more upper-crust accommodations, The Hilton San Francisco offers the finest luxurious and the best of locations.
Some addresses of furnished apartments - hotels in San Francisco:
Update 12/08/2009
EasyExpat.com has set up a partnership with EasyVoyage to provide a wide range of cheap hotels and high quality customer services for our Travel Service. To find the best hotel, nothing is simpler ! All you need to do is indicate you city, your dates in the box below and we will find the best hotel matching your criteria among all our partners’ deals. Is it well situated? Does it have a good rate? Look all the extra information and find the perfect hotel to travel lighthearted!
EasyVoyage is the largest travel comparison site with more than 30 Hotel booking site partners!