I was surfing around tonight and found a link to this story in a L&C thread on the Television Without Pity message boards. It's a crossover fic between L&C and Smallville.
It's mainly a SV fic, set in S1, but with references to a whole bunch of other sci-fi type shows -- Sliders, Quantum Leap, XFiles. And, of course, L&C.
Plot summary -- Tempus visits the SV universe to destroy yet another incarnation of L&C, and Wells takes our L&C there to stop him.
I haven't read very many SV fics, but this is a good one for L&C fans. It respects the 'ship, though with a really sweet twist.
And it's well-written and fast paced, so I think it's worth a try, for anyone who is interested in reading such a story. The writer did a nice job of trying to marry the two universes, and there is some nice humor, too. (As well as some mild to moderate violence re Clark and Clark fighting the bad guy, etc. -- still, nothing I would consider more than PG13 on our boards.)
http://www.smallvillefanfic.com/archive/12/seventytwohours.html I enjoyed reading it, and I thought the SV fans here might, too.
Kathy