Chris, this isn't a major spoiler and I thought it fair to let you know that the freak-of-the-week stories continue for much of the series but my advice is to just take them as they come and try not to let them taint your opinion of the show.
Some of them are actually pretty entertaining and they help strengthen Clark's role as saviour in Smallville, it's also well worth it when you get to the main plots which are often quite juicy and put exciting new spins on Superman's origins.
About season two, one word...'Rosetta'.
And that's all i'm going to say.
