How necessary are Twitter & Facebook for my small business website?

Websites for small business are getting increasingly complex. No longer can your web presence just be a postcard disguised as a website. Your small business website must be socialized, and quickly. You may be able to hold out another year, but not much longer. It can be hard to keep up, it seems like information technologies have sprouted a mind of their own. They're evolving at a warp speed. In America, the technology leads the culture. 
 
Potential clients demand to chat with you. At the very least, they want to get your answer within minutes. They want to sign up for your Tweets and view your Facebook profile. They are getting more use to websites that have video, audio, widgets, a lot of interaction.  I know it can seem a bit crazy, all this transparency and immediacy. You're a seasoned service provider--a professional contractor, not a gizmo-crazed uber-geek who has to keep up with every move your friends make. 
 
But let's not pass judgment too quickly. The new technologies can benefit your bottom line too. 
 
Consider the incredible potential in all this multimedia. You can answer an inquiry within minutes, giving you a decided advantage over your competition. Have a few days of no work between jobs? You may be able to pick up an emergency call on Twitter or Facebook. 
 
Youtube can provide you with an excellent tool to showcase your skills and work history. These days, you can shoot decent footage with your phone (go figure) and the quality is good enough for the web. Take footage of your jobs as you do them. Take shots of the finished product as well. Build up a real-time portfolio. 
 
LinkedIn and other networking sites like it can help you build a professional network to help grow your business. You can expand your network with other non-competing contractors, such as professionals working in complementary trades, or those outside your region. 
 
Twitter can keep your current and potential clients keep up-to-date. They can view your special offers, your Youtube videos, your work schedule and your professional advice. 
 
Facebook reassures your clients that you are a real person who offers quality work and takes responsibility for the work you do. This can give a significant edge to the honest tradesman over all the shoddy operations out there. 
 
Socialize your web presence and increase your business substantially. 
 
Site-O-Rific can socialize your website for a fraction of what other web designers charge.