There are 3 Lana/Dean(Jason) fics on FF.net. I didn't read them, so can't comment on the quality. http://www.fanfiction.net/Smallville_and_Supernatural_Crossovers/1303/2237/10/0/1/1/0/1466/3328/0/0/0/1/
This series is Chloe/Dean(Jason), though Jason being Dean is not a significant part of the series. http://shadowglove88.livejournal.com/tag/series%3A%20mates%20series
Shadowglove has many awesome Supernatural/Smallville crossovers. I think I read a couple where Jason was really Dean, but can't remember anything except the one I gave you link to.
no subject
http://www.fanfiction.net/Smallville_and_Supernatural_Crossovers/1303/2237/10/0/1/1/0/1466/3328/0/0/0/1/
This series is Chloe/Dean(Jason), though Jason being Dean is not a significant part of the series.
http://shadowglove88.livejournal.com/tag/series%3A%20mates%20series
Shadowglove has many awesome Supernatural/Smallville crossovers. I think I read a couple where Jason was really Dean, but can't remember anything except the one I gave you link to.