I'm sure Cnet would welcome the referral of visitors to download.com, with your second idea being the most promising as it would:
1.) Let your visitors learn more about the program (see screenshots, read reviews, etc) before downloading.
2.) Avoid broken links since those direct download links are subject to change.
3.) Avoid skewing of the usage/advertising metrics generated by those links.
However, I cannot provide a definitive response regarding the Cnet TOS, nor any legal implications from copying the description authored by the third-party developers. Thus, your question has been forwarded to our acting forum administrator so that it may be definitively answered by the appropriate department. An official response may not be immediately forthcoming, but I'm sure something can be worked out.
Hy. I'm the owner of a large internet forum. I'm planing to open a special "download" section and post there the content from CNET download zone.
I will explain my plans on this link: http://download.cnet.com/Avira-AntiVir-Personal-Free-Antivirus/3000-2239_4-10322935.html?tag=mncol;lst
THE FIRST IDEA:
I would copy only the "Publisher's description" with the text on the end "This content and download link is property of www.cnet.com" (or something like that) and give direct download link http://dw.com.com/redir?edId=3&siteId=4&oId=3000-2239_4-10322935&ontId=2239_4&spi=f2f9f46838720ca77e982574b5c05a76&lop=link&tag=tdw_dltext<ype=dl_dlnow&pid=11345925&mfgId=6290072&merId=6290072&pguid=Wp1iJQoPjF8AAGbeSosAAACS&destUrl=http%3A%2F%2Fdownload.cnet.com%2F3001-2239_4-10322935.html%3Fspi%3Df2f9f46838720ca77e982574b5c05a76
THE SECOND IDEA:
I would copy only the "Publisher's description" with the text on the end "This content and download link is property of www.cnet.com" (or something like that) and give link to the program http://download.cnet.com/Avira-AntiVir-Personal-Free-Antivirus/3000-2239_4-10322935.html?tag=mncol;lst