Small Office Home Office How To?

I want to set up a simple home office with with phone and data. I just learned some shiny new telephony acronyms today (ie I know nothing) I want to start with 1 or 2 lines in the office (SIP Softphone ok). I would normally do a FXO and a DSL line and then call the phone company for more FXO lines when I need them. Is there a better way (using asterisk)? Is there a How-To somewhere?