Nashbar makes a decent pair of studded tires (either 26" or 700C) according to this review (
http://icebike.com/Equipment/nashbar700c.htm).
I've been wanting to get some but doesn't look like it'll snow in MD this winter :-( I asked about these tires in an earlier post and people who'd used them said they were not junk, worked well and a lot cheaper than Nokians.