As a new Kindle user (and new to ebooks), I have to say that I don't much care for Locations, but then I don't they are any worse than page numbers. Having gone through college where I was happy to buy an older edition of a text book, it became all too familiar to have page numbers be different. Even Chapters were different in those cases.
In terms of the original post, the easy, although probably imperfect, solution would be to look at what "page" or location you were on with respect to the total number of pages...
i.e. if you are on page 300 of a 600 page book, you could say you are 50% of the way through your book. You could then go to your ebook and based on the number of locations bring yourself to the 50% point of that book. For instance, if the same book had 8000 locations, you should put yourself to that location. You shouldn't be too far off from where you need to be.
That would probably be about as accurate as you could do if you were jumping from various printings of any other book. A page number is really only as good as keeping with that edition or printing of a book will do.
The other solution is to navigate to whatever chapter you were in if the book your in has chapters. That wouldn't be much different than the comments with respect to the Bible earlier in the thread.
Ultimately, I like the % reference on the location bar. Locations don't mean much to me, but then in reading a print book, page numbers only meant something with respect to my progress in the total of the book. I just cover more locations than I did with pages. Of course I'm not reading any faster, but it feels that way sometimes
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