Powerpoint marketing is good both for getting direct traffic and for developing your backlink profile to your money site.
Here is my own list of powerpoint websites that you are welcome to use for uploading your own ppt presentations.
Empressr - The Best Online Rich Media Presentation Application
Sign Up For DocCash
Online Presentations | Mobile Video Presentations | eLearning | Brainshark
Myplick - share PowerPoint presentations online, slideshows, slide show
Issuu - You Publish
Upload & Share PowerPoint presentations and documents
SlideBoom - upload and share rich powerpoint presentations online
Welcome! - eSnips
PowerPoint presentations! View, share examples. Upload PPTs to YouTube | PowerShow.com
Prezi - Ideas matter.
RapidShare ? Secure Data Logistics
Upload and Share PowerPoint Presentations Online - SlideServe
PowerPoint Presentations Online - Upload and Share on authorSTREAM
Deal Room - Online File Storage | Document Collaboration | Document Sharing | Online Project Management | Collaboration Software
VCASMO - Home
Zentation.com - Webinar software
KeepandShare: Online Secure Sharing of Calendars, Files, Addresses, To Dos, Databases & Photos
edocr | edocr
GigaSize.com: Host and Share your files
Presentation Software | Online Presentation Tools | Web Presentations | SlideRocket
4shared.com - free file sharing and storage
Google Documents (enable public viewing)
If you know of any other good Powerpoint websites please share them with us in this thread and also feel free to ask me any questions on this topic.