The other option is to grid-tie, but agree not to sell any power back to them (which can be configured in the inverter). You would then use utility power when you don't have enough solar output to meet your needs.

Disclaimer: I have read WAY too much Home Power magazine over the last decade. I could design said system in about 20 minutes, part numbers and all. [http://www.homepower.com/]

For most home solar installations, this would dramatically skew the financial break-even for solar installation.