I wanted to stop back in here and update, since I've finished off all my placenta.
I wasn't able to prepare the placenta until the fourth day PP. I cut off the membranes and the cord and washed it until the water ran clean (or mostly so--it took a long time!). Then I cut it up into thumb-sized pieces and froze most of them. DH blended them into fruit smoothies for me, two smoothies per day with two pieces each, for about a week, and one and one for another week. I think I had about 2 1/2 weeks of smoothies. Only one smoothie tasted a little irony, and one had an especially membranous piece of placenta in it that didn't blend (that was yucky); aside from that, I couldn't detect the placenta.
The main reasons I wanted to eat my placenta were to replenish the nutrients in my body, and to avoid PPD, since I am quite prone to depression, especially in the winter. I'd been feeling rather depressed in the last month or so of the pregnancy anyway, and with the way the birth turned out (planned home UC turned C/S after 49 hours of labour), I'd say the likelihood of becoming depressed was pretty high. But this last month, aside from frustration at the pain and physical disability, I've been probably the happiest I've been ever. The first week, I was incredibly weepy, over everything. I'd just look at my sweet boy and burst into tears of love. :) But I've had not a sign of sadness. So...well, who can say how I'd feel otherwise, but even if the affect is only imaginary, I'm glad for it!