There were no other web service or RIA in the last months where is a run on invitations like it is on google Wave right now. And it's just the preview. If you're on Snow Leopard Wave runs fine, but actually there is only a hot coded google Gears for 10.6 available (Gears for SL from MailPlane). And Gears is necessary to get the whole Drag'n Drop features in Wave (okay, it's not when you like Chromium, but on my Mac Chromium crashes frequently). I've also tried Safari, Camino, Firefox and Fluid.app — all of them are stable but without these cool Drag and Drop functionality.
Waveboard 0.5 came today and it's the missing link. Drag and Drop works almost fine (but you'll need Gears for SL from MailPlane), just Drag'n Drop File Upload is still crashing (seems to be a local issue).
So Waveboard is worth a try. It's fast, stable and free.
Update: Dirk (Developer of Waveboard) contacted me and announced Version 0.6, which is still available for download right now. Crashing due Drag'n Drop is still solved and Waveboard rocks!
