I do all of my "study" with BW7 on my laptop. There are times, however, when I must sever the power cord. When I do, I've greatly benefitted from Olive Tree's software for the PPC.
They are making their fonts a little-bit/whole-lotta-bit better, which will ease the anxiety of not gazing upon BW7's. I believe these new unicode fonts will poco retardando my maculas from smoking, bubbling and fizzing.
The article is here.