To start, you can see what Trip Advisor has to say about Berkeley.
If you are flying in, SFO is likely the main airport, although sometimes there are good fares to OAKland.
From both airports, and the city of San Francisco, BART runs direct train/subway lines to Berkeley.
It's possible to purchase an advance airport ticket if you are arriving internationally.
Once you are in Berkeley, the local public transit offers day passes for $5.00.
Hotel accommodations tend to be on the expensive side, especially if you wish to be within easy walking distance of downtown and the UC campus. The Berkeley Visitors Bureau lists these hotels, of which The Hotel Durant (2 blocks from Cembalophilia at the Berkeley City Club) is offering this courtesy booking link.
And if you are driving or plan to have a car with you, this is parking information posted by the City of Berkeley.