codeigniter alternative sessions?

[eluser]Abel A.[/eluser]
I'm trying to use memcached with CI for my sessions, but can't find a stable plugin anywhere. Any recommendations? I've also considered configuring the session handler in my php.ini file, but it's not optimal in my situation. The reason is that I will have multiple servers and need to have a way to handle user sessions. Any ideas?

[eluser]Abel A.[/eluser]
If not memcache, is there a way to support sessions on multiple servers?

The only thing I can think of is having a remote mysql server that will only handle sessions, but that's not fast enough in my case.