wired headphones with mic: works great and my FM reception works great. It doesn't pick up as many stations as my home or car stereos, but it pics up more than my old walkman.
replacement battery: I'm going to buy the 3500mah when it comes out, but till then, I bought a regular replacement battery. It seems to be holding a charge better than the battery that came with the phone, but i haven't used the original battery that much, so I can't really determine anything to any accuracy.
invisible screen shield: It came with one non-reflective cover and two clear covers. The clear covers look better on the phone in the house, at night, etc. In sunlight, they suck. The non-reflective cover doesn't look as snazzy... until I got out in sunlight, then it worked great. I'm sticking with the non-reflective for now (at least the summer).
home/car charger: combo charger from Sprint that can charge USB devices and the Evo at the same time. The plug can either be used in a cigarette lighter or a household outlet. I'm not impressed. You cannot talk and keep the Evo plugged in at the same time, the cable falls out too easily.
black silicone cover: dust magnet, feels "loose" on the phone. On the other hand, it was very easy to insert the phone, it's "grippy" feeling is perfect. The camera lens is recessed enough by it that I don't have to worry as much about scratches.
Macro/Wide angle Combo Lens: The reviews for this seem to be incredibly positive. I take a lot of macro shots, so I think I'm going to be pleased when it arrives. btw, the
website I bought it off of is offering freeshipping and 10% off on this right now.
Freedom Pro Folding Bluetooth Keyboard: I can't wait for this to arrive!
USB female to USB-micro male converter: when this arrives, I'm going to see if the Evo can be used in host mode with other USB devices like an external harddrive, monitor, keyboard, etc.
I know the droid can.