There are far too many such hoaxes for us to list them all so please, PLEASE, when you see an offer of something for free, some donation made or anything at all good happening as result of forwarding an email, you can safely assume it's a hoax!.

Both of these hoaxes promise a free phone for forwarding an email. The second hoax actually tries to draw upon the first hoax to give both hoaxes some credibility. Amazingly, I've had people tell me that they know this is a real offer because they also saw the other hoax. This is currently the most common version of the first of these two hoaxes:
 

Hello dear customer   We from Nokia, are very happy to see that the people on the  internet are
visiting our page often.  To keep the customers who use the internet happy, we have  developed a new series of mobile telephones called WAP (wireless  application protocol).  They are made for people who are on the road often and  don't have the internet with them, they can now get the  information on there telephones. Unfortunately, not many people have heard about WAP, that's  why we are spreading this e-mail around the net. 'What's in it for me?',you'll probably think.Well, everyone who forwards this message 10  times, will receive  the Nokia 3210.Everyone who forwards this message 25 times or more, will  receive the Nokia 7110, the first WAP telephone.   2weeks after you've forwarded this message Nokia will  contact you about your adress. This message is only for Microsoft  Windows(c) users,  Nokia can only see how much you've forwarded the message if you use Windows 95 or newer.

Good Luck  James Dorfeld  Vice President of Nokia Communications
The contents of Nokia World Wide Web pages are Copyright (c)  Nokia Corporation 2000.  Any rights not expressly granted herein are reserved.  Reproduction, transfer, distribution or storage of part or all of the contents in any form without the prior written permission of Nokia is
prohibited except in accordance with the following terms. Nokia consents  to  you browsing Nokia World Wide Web pages on your computer or printing  copies  of extracts from these pages for your personal use only and not for redistribution unless consented to in writing by Nokia. Individual  documents in our World Wide Web pages  may be subject to additional terms indicated in those documents.

The above hoax was followed by this hoax:

Subject: Free Wap Ericsson Phones

Our main competitor, Nokia, is giving free mobile phones away on the Internet. Here at Ericsson we want to counter their offer. So we are giving our newest WAP-phones away as well. They are specially developed for Internet happy customers who value cutting edge technology. By giving free phones away, we get valuable customer feedback and a great Word-of-Mouth effect. All you have to do, is to forward this> message to 8 friends. After two weeks delivery time, you will receive a Ericsson T18. If you forward it to 20 friends, you will receive the brand new Ericsson R320 WAP-phone. Just remember to send a copy to Anna.Swelund@ericsson.com That is the only way we can see, that you forwarded the message. Best of luck Anna Swelund Executive Promotion Manager for Ericsson Marketing Any rights not expressly granted herein are reserved. Reproduction,> transfer, distribution or storage of part or all of the contents in any form without the prior written permission of Ericsson is prohibited except in accordance with the following terms. Ericsson consents to you browsing Ericsson World Wide Web pages on you computer or WAP-phone and printing copies of these pages for privte use only. <
 
 
 

As we have mentioned before, there is no email tracking that would enable the actions claimed in the Nokia version of this hoax. (The Ericsson version actually provides a more believable situation by asking that you CC a third party.)

Anytime you see something that offers you (or someone else!) money or some benefit for forwarding an email, you can assume it's a hoax.

If you haven't already, please read about the Forward For Money hoaxes