This acquisition is mostly focused on technology, assets and, as a consequence, the founder of drop.IO, Sam Lessin, will join Facebook. At this stage it is unclear if Facebook will hire a larger part of the company. For existing users however it means the service will be shutdown in the short term.
What does the technology include ?
Interestingly enough for ProcessOne and the XMPP community, the core platform asset includes an ejabberd based XMPP service to power the real time parts of the service.
Quoting the drop.IO team:
Actually, this acquisition strengthens both XMPP as a standard for realtime communication on the web and ejabberd as a reference implementation. Facebook already was using Erlang and ejabberd for their chat service. This acquisition means that there will be even more XMPP, Erlang and ejabberd at Facebook. Given the size of Facebook user base this is another good step for XMPP ubiquity for real time web services.
XMPP stands for Extensible Messaging and Presence Protocol and is an open standard XML based messaging protocol. The protocol already powers Google Talk infrastructure, Nokia Ovi service and thousands of large scale deployments around the world.