And as Jonathan and others have pointed out, don't upgrade to 7 just because it's available. You should consider this a major implementation, even with a small business.
If at all possible, build a test environment, VM's work fine, and do some testing. After the difficulty I experienced during the stone age upgrading from 5.5 to 6 (or was it square wheel to round?), I would recommend the off-box upgrade if financially and technically possible.