The truthfulness of the Book of Mormon is a separate issue from whether or not the church is the "one true church" with the restored priesthood authority. Joseph Smith' role in translating the Book of Mormon is a separate issue from his later roles, such as establishing the church. I have frequently pointed out the serious nature of this alteration in "revelation":
Original 1833 Book of Commandments
BC 4:2, p. 10 — and he has a gift to translate the book [of Mormon], and I have commanded him that he shall pretend to no other gift, for I will grant him no other gift.
Altered to:
D&C 5:4 — And you have a gift to translate the plates; [and this is the first gift that I bestowed upon you;] and I have commanded that you should pretend to no other gift [until my purpose is fulfilled in this;] for I will grant unto you no other gift [until it is finished].
As a 19 year old investigator, I instinctively understood that these were two distinct issues. Apparently the church recognizes this as well when it encourages investigators to not only pray about the truthfulness of the Book of Mormon but to pray about Joseph Smith as a true prophet. Many of you know my history in that, as an investigator, I received a strong "yes" to my prayer about the Book of Mormon, but never could get a "yes" answer to Joseph Smith being a prophet in general, or the church being the "one true church", or the church having the real priesthood authority of JC.
Not only is it logical to separate the two issues, but obviously whoever wrote the D&C separated the two issues, hence, the necessary alteration. Saying Joseph Smith would have no other gift other than to translate the Book of Mormon negates later claims, including the priesthood restoration and restoring the "true" church. That wasn't his mission. His mission was to translate the Book of Mormon, according to the original "revelation".
MG -
I visited the site you linked. The problem that I see is that, unless I Overlooked it, most of the site is dedicated to the types of proof that people on MAD are so fond of - the connections with the Old World - the Hebrew connections. The reason I find all of that uninteresting and nonpersuasive is because, from what I've read, it would be possible for a nineteenth century person to make these connections if they had certain background information. These arguments depend upon insisting Joseph Smith was the sole author, and insisting he was too ignorant of a person to possess any of this background information. Of course I haven't read ALL of these arguments, due to my lack of interest, but this appears to be the backbone of the ones I've read.
To me, the historical truthfulness of the Book of Mormon is entirely dependent on finding a reasonable location for its events in the New World. And that happens to be the most difficult problem facing the historicity of the Book of Mormon. The current "fad" is, of course, Mesaomerica - but the cruel reality is that no empire as described in the Book of Mormon, anachronisms aside, existed in Mesoamerica at that time period. Brant Gardner attempts to deal with this problem by interpreting the Book of Mormon in a strained manner.
I analyzed this problem in detail in this essay:
http://zarahemlacitylimits.com/wiki/ind ... _and_Power