I have the Incase neoprene sleeve sold at the Apple store. It's a nice sleeve, I don't mind the zipper but it's starting to rip on the inside and I barely use it.
yeah, I just wanted something simple to slide inside my brenthaven bag. it works well. I bought it about 5-6 months ago, I'm not sure why it started to rip. I'll take a picture when I get a chance.
Wow, some very nice sleeves in this thread. Here's my cheapskate option - $2 worth of materials and 5 mins of time. Effective though, friends keep asking me to make them one.