And I thought Hume and Plato were unfathomable

For years, the fourth dimension has been a staple of science fiction; how else is the TARDIS bigger on the inside; and my recent research for a d20 Future campaign taught me that the fifth dimension is more than a great vocal group (it’s probability). My friend Mark had a link on his site to this book explaining how there are 10 dimensions. Ten? Sounds like a bunch of Star Trek jive and Gary Gygax’s dribble (he explained the dimensions in the back of a book for GDW). Nope, physicists and mathematicians are serious yet this author seems to have a different spin on it. 
 
I watched the flash presentation on the link above and my head swam after the sixth dimension. Maybe someone else can explain to me, how there can be more than one infinity?