[fjtorres]

I've bought both bundles and omnibus editions in both print and ebook.
A long time ago in my university days, I ran into a bundle offer from Berkley SF for a boxful of paperbacks (60, I think) for the price of 10, pretty much sight unseen. Took care of a whole summer's reading almost by itself. And, of course, I have dozens of book club editions that combine multiple volumes into one edition.

In more recent times, I've bought into Baen's webscriptions (all), an occassional Nightshade bundle from them, and most of their single author introductory backlist bundles. Some of the discrete volumes in the bundles are omnibus editions.

As I see it, an Omnibus collects multiple volumes by a single author that can be presented as a single narative or arc, whereas bundles are simply a marketing/discounting move. Both are welcome, but if you are doing any editorial mods, "omnibusing" would make more sense, as I don't *think* you'd want to carry two editions/versions of the same volume, one for discrete sale and the other for bundled sales.