Well, installed FBreader 180, but didn't see the difference in any of the books I opened (this program is for epubs, right?).
It could be that my books have defects, cause I tried to open a few, and only some of them opened. Others said "Cannot open. Maybe this book is damaged or in a format not supported".
Thanks for the themes fj, I installed them and will rotate them whenever I feel like changing them. Right now, I'll stick with stamir, because it looks pretty much like the original 360 theme with smaller icons. And I do like that one the best, except for the small book list.
After experimenting somewhat with my 360, I think the best format it handles is fb2. I am impressed that this format is not as popular in the US, but I think is pretty much standard in Europe. Go figure.
Anyway, I'll keep posting my findings here. Thanks so much for you comments and keep them coming, please.