I hope I'm not wrong with this, but you could easily take BART from Oakland airport to the city.
Just take air BART ($2) and it will take you to the Oakland colleseum stop. From there take BART towards San Francisco. You want to stop at Powell. That should be about $3.50ish. Then, I know there's a bus that could take you to the area. I don't know the number of it, but if you can't find anyone, BART is a very nice alternative.
Also, check out Muni's site (do a yahoo / google search for "San Francisco Muni") if you want to know which bus to take from the Powell stop to the hotel.
Hope this helps.