These are the links I use the most.

http://fiascofarm.com/                                                                                        This site has all the info you need to know on goat husbandry and care.  They also have birthing pics that are very helpful.  Be sure to check out all this site has to offer!

http://www.gerleranch.com/                                                                         This is the farm I got my Nigerian Dwarf group from.  She has some really great stock!

http://www.dakotaeranch.com/                                                                     This farm produces good Nubian stock.   Two of my does came from this farm.

http://goat-link.com/                                                                                              A page full of facts and an answer for most of your questions. 

http://goatdairylibrary.org                                                                               The library of all things goat!  This site has lots of medical info.