People may have noticed issues connecting to the website. This appears to be down to network issues at my web host's end of things since I am only able to reach my server by attaching to its console directly from the port it's connected to. Traffic does not seem to reach the server from outside. I am in contact with my host whilst I try to resolve this.
Apologies for the incovenience
If you're looking for downloads, the packages are all available at
http://sourceforge.net/projects/swiftmailer
API documentation is included in the downloads, though the wiki is currently inaccessible.