Mozilla Labs are at it again - they seem to be in the mode for churning out communication applications at the minute and from the looks of this one it seems they might be a little jealous of the eager anticipation from people wanting to use Google Wave. From the looks of this product it does seem that way, though if you look a little closer it does a little more than it seems. Whereas Google Wave is primarily a medium for communication to take place on, Raindrop is more of an aggregator similar in some respects to Friendfeed.
At present Raindrop can take feeds from Gmail, Skype, email (using IMAP only) and Twitter and collates this information into a single stream in what they hope is an easy to use, extensible environment. So although initial screenshots are reminiscent of Wave it is in fact nothing like it. What you'll also find is that it's not hosted service either - it's something you have to run locally which means having Apache, IIS, etc. set up on your system is likely to be a requirement unless the it uses it's own inbuilt fileserver (preferably with the ability to change the port number).
The whole system is built using modern technologies such as Dojo (a Javascript library) and CouchDB. I'm quite interested in seeing where this goes, but I'm afraid I can't really see a massive use for this at the minute though maybe this will change as their development continues.
