Creating a company is very easy and fast. If you show up at the State of Oregon Corporate Division in person, you can fill out a 1 page form, write a $50 check, and have your corporation (or LLC) created on the spot.
But - that's not how you want to do it. It really is worth setting it up the right way. You want to use an attorney who has experience setting up companies. And if you are planning to obtain investment funding, you'll want to use an attorney that has experience with startup securities transactions. Many of the law firms in Portland that have emerging business practices (and experience with startup securities transactions) are listed in the OregonStartups.com service provider directory.