Hmmm, I have a 500, so the synchronized option doesn't apply to me, but for a guess, I'd try pulling the books out of the synch directory into the regular library section and then see if it doesn't either just remove them itself, or let you delete them from the Reader.
I think of the synch function is being meant for things that are updated regularly, like RSS feeds etc., so I probably wouldn't have tried using it for books ... but that perspective is shaped by having/using the 500 model.
Baen just rocks is all. I find I can take their RTF files and drop them right into the Reader and they work just fine. I usually stop into Word or WordPad and bump up the base font (select the whole text with ctrl+a, then ctrl+> to increase the font size from whatever it is -- that keeps the chapter titles bigger than the text), but other than that, no processing required.
However, most of the time I run them through BookDesigner, and get an LRF file, which is smaller and displays the picture.
Another option is the libprs500 application which you can find on the forum, it'll convert several formats of the Baen files with no fuss. There's a GUI for it, but it can be run by command line, if that's your preference.
You may find that the battery life improves over several charge cycles as the meter routine learns what "full" really looks like. You also may get some improvement by deliberately discharging the battery fully (the MP3 player function is good for that, if not for much of anything else), and recharge it. Also, let it charge 'til the light goes out, that's the only way to be sure it's truly fully charged.
Also, the Reader will draw some power even when it's not in use, if you leave it in sleep mode. If you know you're putting it aside for several hours, you might want to use the "turn off" feature in the settings menu, that shuts it down fully, but it takes about 2 minutes to reboot from that.
I'm glad you're happy with your new toy.
