@state not being saved

[Bluebie, Jenna]

Also worth noting that camping includes it's own session support.  
We're not using bits from rails for sessions except for ActiveRecord  
itself, and then only if you're using active record sessions. You  
might like to try the cookie sessions included in current Camping 2.0  
builds (Magnus has more info on where you can grab those gems) which  
doesn't depend on ActiveRecord, if your session data can fit in under  
a couple of KB's. There's also an older though fully functional  
implementation of cookie sessions on the wiki for 1.5 by yours truly. :)

essentially it works by storing the @state hash in a cookie, and  
digitally signing the data with an SHA hash of some sort, so while the  
user can see what's in their session if they're determined enough,  
they cannot tamper with it without knowing rather secret details about  
your server environment. You can also provide a custom key in your  
code for it to use for security bonus points. Without the key, so long  
as SHA isn't ever broken, they won't be able to tamper with the data  
without the server realizing and invalidating the session, starting  
them afresh. :)

I really hope the ActiveRecord crew sort this out before we get too  
close to releasing 2.0 officially! :)