Love Twitter? Hate it? Chances are you'll feel the same way about Jaiku. But it's worth looking at the two services side by side. If you're trying to decide which service to use, or if you're thinking about leaving one for the other, check out Veronica Belmont's latest Prizefight video: Twitter vs. Jaiku.
Veronica Belmont pit Yahoo Mail (beta) against most geeks' favored e-mail service, Gmail. If you're aiming to dump your current PC (or Mac)-based e-mail app and move to the Web, this is a good, basic comparison of the strengths and weaknesses of the two services.
I'll tell you right now that Gmail won, by a nose. Click through to the video to see how Gmail performed in each round of the fight: Interface, Features, Speed, Organization, and Security.