Another resource that I would recommend to every LDS defender of the faith and to every serious investigator is Barry Bickmore's site on Early Christianity and Mormonism. Comparing modern LDS concepts with the writings of early Christianity and modern "mainstream" Christianity provides powerful evidence that an Apostasy has occurred, and that The Church of Jesus Christ of Latter-day Saints really is part of a divine Restoration of the Gospel. Not every modern LDS practice or doctrine agrees with every early Christian writing, make no mistake, but there are some surprising patterns that our critics just can't explain away. What's great is that you can go to the original sources and explore for themselves. The idea that modern "mainstream" Christianity represents authentic "historic Christianity" is certainly cast into doubt, unless you limit "historic" to time periods after the 15th century for some issues or after the 3rd century for other issues.
I'm also happy to see that some Latter-day Saints have helped to protect the name of Joseph Smith by creating a pro-LDS site at JosephSmith.com. The site has some links to a few of my favorite LDS apologetics sites and two links to my essay on DNA and the Book of Mormon (one at JeffLindsay.com, and the PDF version that is available at LDS.org).