The copy of Warbreaker, online, and any preview chapters we put up for other books are not the final version of the book that got published. They have gone through proofreading since then, and the product in stores should have a lot of the errors corrected. If you find errors in annotations or other web-only content, drop me a line on my contact form, and I’ll pass it along to my assistant to correct.
If you want to send me a list of typos you find in the book once it is out, go ahead–it’s too late to change anything in this printing, but we can probably get it fixed for the paperback or future editions.