Two Book-Related Questions

Now that the third edition of Effective C++ is done, I have time to turn my
attention to two other book-related issues, and I'd like your feedback.

- ELECTRONIC PUBLICATION. We'd like to come out with a new electronic
version of all three of my books to replace the current CD (which has
only two books on it). Any comments you have on the proper format and
feature set for such a product would be most welcome. Should we again
use an HTML-based approach on CD? Should we go with PDF instead? Is
there some other format or delivery mechanism that would be most useful?
Please let me know your thoughts on how you'd like to electronic versions
of my books made available.

- ERRATA LISTS. Currently, my book errata lists are hand-coded HTML. It's
so primitive, it's not even retro. It's ugly, you can't do things like
search for all entries for a particular page or printing or made after a
certain date, etc. It is, quite honestly, an embarrassment, but it's
easy for me to maintain, there are only so many hours in a day, and one
has to prioritize, etc. Still, I'd like to do better. If you have a
suggested way to approach this problem, or if you know of errata sites
for other books/CDs/etc. that do this particularly well, please let me
know.

Thanks,

Scott