S-1 forms detail a company's strategy for making money. Good place for business plans!
Go to EDGAR (the SEC database) and
1. Search Most Recent Filings
2. Limit to S-1 Form
3. Avoid the S-1/A (amendment forms) and read S-1s all day.
Now, one thing you can also do is go to the advanced search screen and type in a keyword (insurance, computers, etc.) and s-1. This should get you closer to browsing S-1 plans in your field.
Austin Business Journal- See what new businesses opened in the Austin area (and closed), who's hiring and expanding, and profiles of local business people.
Entrepreneur Magazine - Profiles of new businesses and successful entrepreneurs
San Antonio Business Journal - San Antonio new businesses, expansions and successful businesspeople. See what they're doing.