I just so happened to come across the this at REI yesterday:
http://www.rei.com/product/774423
I think it'd be perfect. I don't see the weight listed on the site but my guess is that it's around the same weight as the Swobo that newfsmith listed above.
If you need lighter and more gearing than perhaps a Rondonee or light tourer model designed for credit card touring would better fit your needs.
I second craigslist too. In our area, the listings for bikes are really starting to pick up. Maybe you'll luck out and find a Trek 520 or 720 (look for their older head badges, Trek reused the 720 model number); or other vintage tourer.
Everything in moderation, including moderation.
2007 Rodriguez Adventure/B72
2009 Masi Soulville Mixte/B18
1997 Trek 820 Step-thru Xtracycle/B17