[sametmax]

Na the reason Google wave failed was that the idea was great but the realization sucked.

Most of my friend were unable to understand the UI. The thing was sloooooow. Trying to do anything meaningful would require a lot of tinkering.

[dkersten]

This was my problem with Wave. I found the UI really confusing (and the value prop not high enough to get over the learning curve) and incredibly slow. I tried it a few times and decided I didn't care for it.