My bigest complain of Libronix is the resources it take upon my computer. So having it online is awesome. I like to know how to buy books and add them to the online version.
It would be nice to have a online Libronix interface. I find it a tad too basic. However it is still awesome. My pastor mention it to me and I was like damn have to check it out.
To buy books, just go to www.logos.com - find the book you want, and click on the "Add to Cart button". As far as I can tell, if a book is available on the iPod app, it's available online via biblia. So just look for this icon to be sure your book will be available online.
I should also mention that you need to login to biblia.com with the same login you use for logos.com - only then do your purchased resources show up.