From the April 19, 2002 "Alaska's World" newspaper:
"Currently, we have 102 aircraft in our fleet, and our plan is to grow the fleet to 110 aircraft by the end of '03. The question right now, though, is how we're going to do that. While we're scheduled to take delivery of five new aircraft from Boeing, we're also to return 11 leased aircraft this year; six MD-80s and five 737-400s. So we're considering extending leases on some of these aircraft, as well as acquiring additional aircraft. And looking ahead, we're reviewing how the 737-800 might fit in our fleet, since it's the natural Next Generation aircraft to replace both the MD-80 and the 737-400."
Seems like there's some tire-kicking going on in Seattle! The -800 would be a great fit.