I hope I haven't just missed this somewhere, but...
1) What are the advantages / disadvantages between looking for a publisher for printed books vs ebooks?
A publisher with books in the stores is probably not a scam operation.
Generally speaking, the money is WAY better for print publication with even a small press over a royal-only paying e-press.
Again, this is an old list, but the royalty-only paying e-books are not in the same league as advance paying print books.
http://www.brendahiatt.com/id2.html
Sure, you might bet a 40% royalty on the "cover" price of an ebook, but only make a few hundred sales.
That's not as good as getting a 3-4-5 figure advance from a print house.
2) Is there a difference in the type of novel that is published online vs in print?
Sometimes. They may share genres and audiences, and younger readers raised on computers are more comfortable with an e-formats, but hands down, the sales are better for print books in the stores.
The gap is closing. Some e-titles are outselling print books, however, these are titles that also sell in print.
Print publishers are jumping on the e-book bandwagon now that e-readers are the hot new toy. Expect to see a big push in reading device sales for Christmas.
Yes, there will be more e-book downloads, but for now they will be placed with the big publishers who have name writers with a track record of sales. Those writers will get paid advances.
Writers who go for a house that offers only online sales will not sell as many copies.
I don't like having a book lying around while it's being shopped by my agent, either.
But it's part of the job if I want to get the best money for it.
If you're happy and comfortable with an e-pub operation, then go for it.
But I like the print publishing money that includes e-sales in the contract.