I've got some trees, pines particularly, that I'd like to slab for an
outbuilding. I understand there's a ripping blade for a chainsaw but have
heard, also, that it's not necessary.

Certainly Mac's sawmill would work better but I haven't got Mac's money .
Any thoughts, warnings, advice, suggestions?

Your post was timely, I was just thinking about this yesterday when I rolled two
18" cottonwood logs under the shed roof to dry. Here are the websites for the
portable sawmills people have replied with. Granberg has the simple, low-tech
devices to convert your chainsaw into a weekend sawmill including ripping
blades. Dan

http://www.baker-online.com/
http://www.granberg.com/
http://www.logosol.com/
http://www.timberking.com/
http://www.woodmizer.com/en/index.aspx