I found a nifty experiment by Russell Beattie on mobdex.com; RSS serialisation of public domain ebooks.

Each novel on Mobdex has its own RSS feed, which you can add to your aggregator; Mobdex then delivers you a page of the book at intervals you can customize yourself, so you can read the installments at your own pace:

And if you're a speed reader and want the pages to be updated more frequently, add an "interval" parameter in minutes. This would produce another page for my aggregator every couple of hours:

http://www.mobdex.com/rss?book=116&id=russ&interval=120

Check here for more info.