4 hot IPOs will begin trading on Tuesday: Gadzoox Networks (ZOOX) which priced at $21, above its upwardly revised range; Engage Technologies (ENGA) which raised its range to $13-$15; Talk City (TCTY) which priced at $12, the high end of its upwardly revised range; and Convergent Communications (CONV) which priced at $15, above its original range.
