Of course, there are many more eBook readers out there, and manybooks.net strives to provide eBooks in as many formats as possible -- we've got a brief introduction to the variety of eBook devices available, as well as an exposition on the formats available on this site, just in case you'd like something a little different.
However, the best source for information on eBook reading -- software, hardware, you-name-it -- is MobileRead. Don't miss the forums, in particular the user-contributed eBooks with formatting, and make sure to bookmark the Wiki Knowledgebase (it's a great resource you can contribute to!).
If you're using Windows, removing ".php" from the filename and adding ".pdb" to the file should fix the problem. Microsoft Knowledge Base Article - 307859 "How to change file associations in Windows XP" may be useful if you're having trouble changing the file extension.
Quite possibly - we're always on the lookout for new work to promote! Tell us about your ebook and let's see what we can do...
Got a question? Feel free to contact us!