In regards to feature priorities and making Bluefire Reader better. Here's a recap of recent work, and a list of the things we are working on right now.
We initially released Bluefire Reader for iOS in fall of 2010. In fall of 2011 we released Android.
Here's stuff we did in 2012:
Support for the new iPad Retina display
Support for the new iPhone 5 screen size
Support for iOS6
Support for multiple concurrent user accounts (Adobe IDís and Vendor IDís)
Single Sign-on option for Vendor ID customers
Improved PDF performance and reading experience
Support for system fonts, a feature that enables more reading settings and enhanced rendering of ePUB formatting
Online dictionary look-up
Support for external hyperlinks in ePUB and PDF titles
Streamlined highlighting (bypasses Notes panel)
Sharing via Facebook, Twitter and email
Contextual ebook text search results
Collections (iOS only)
Swipe for brightness control (iOS only)
Enhanced side-loading (iOS only)
Annotation export (this one is particularly cool)
Support for Chinese, Japanese and Korean text, including vertical writing and right-to-left page order and Japanese Typography (e.g. Ruby, Kenten, etc)
Enhanced Sign-in workflow
The Asian language features noted above required implementation for support of several specific elements of the ePUB3 spec.
We also contributed to the Readium project in 2012. Readium is an IDPF sponsored open source epub3 reference web app that runs in the browser.
So far this year we've released updates on iOS and Android:
iOS - improved cover image generation, and much better support for large libraries of books (better memory management, smoother scrolling in Library, etc)
Android: lots of stability and performance work was done. Still much work to do, and another release coming soon with more.
Here's what we are working on now:
Adding Pinch/Zoom on images in EPUB
Read Aloud and other accessibility related features
New Web service and app features for syncing location in ebooks across multiple devices
Windows versions of Bluefire Reader
Full EPUB3 support
Other cool open source projects (announcements on that coming in the near future)
Better library loan handling (e.g. show expiration dates in Library views, sort by expiry, Borrowed auto collection, offer to delete when returned or expired, etc)
Better text selection interaction (particularly on Android)
More responsive anchor link interaction
other stuff coming (e.g. revamp of Android UI, Native code OPDS renderer, etc)
The "to do" list is really quite long. Some may disagree with how I've prioritized. Fair enough. Always trying to be smarter about it.