Called H1Siri, the port has appeared on the Cydia.be repository. It's unclear how exactly this port works; however, it may use a proxy server which is likely being crippled by the huge influx of traffic and is causing intermittent connectivity for early users.
To test H1Siri out, you will need to add the Cydia.be source to Cydia. Then download and install the 100Mb+ package.
Take a look at H1Siri in action below thanks to a YouTube video by xxIvanRaidexx...
Apparently the package is on the iphone3gsystem.fr/cydia repo as well.
We are not able to verify the legality of this package or the security of your data while using the package. Use at your own risk.