mivox - 9:16 pm on Nov 5, 2001 (gmt 0)

Have seen this one twice recently... ;)

Harked/Harking, Hawked/Hawking

You hawk your wares, but you hark to the sales pitch being loudly delivered by the guy in the next booth over, who's hawking your competitors wares...

All WebmasterWorld visitors should harken to our site TOS, which specifically prohibits them from hawking their own wares, or those of their affiliates...

Hawk [dictionary.com]
v. tr. To peddle (goods) aggressively, especially by calling out.

Hark [dictionary.com]
intr.v. [harked, hark·ing, harks] To listen attentively.