Why can't my computer find the Internet since I loaded Lion?

Any help out there? All my other devices work just fine...

Disconnect all USB and Firewire devices (except keyboard and mouse, if applicable.) Delete and try to recreate your Ethernet connection.
If unsuccessful, reset the SMC and try again.
Intel-based Macs: Resetting the System Management Controller (SMC)
If still unsuccessful, back up all data, then boot into Recovery and reinstall the Mac OS.
OS X Lion: About Lion Recovery
If still unsuccessful, make a "Genius" appointment at an Apple Store to have the machine tested.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros (do this only if you have at least two complete, independent backups, and you know how to restore to bare metal from any of them.) Don’t erase the Lion recovery partition, if present.

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    ~~~~~~~~~~~~~~~
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    ~~~~~~~~~~~~~~~
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