No wireless on the plane doesn't really bother me too much, as my laptop is usually on my lap, not the tray table, and even if it were on the tray there wouldn't also be enough space to move a mouse around.

I do have a wireless mouse and I love it. I use the MoGo. It is more expensive, but there is also a huge convenience to it. The device stores itself in your PC Card slot and recharges itself there, so no batteries and nothing "extra" to carry around in your bag. Also, it uses the BlueTooth transmitter built in to your laptop instead of having its own USB module that you have to plug in, saving more weight and junk from your bag.

The only problem I have with optical mice is that I find myself in conference rooms a lot and the glass tables muck it up pretty good. But a piece of paper handles that just fine.