Slideshare is excellent: you can upload Powerpoint, OpenOffice or PDF presentations which are converted to a YouTube-like Flash presentation. You can add tags, view slides full-screen and share your slide either at the site or by embedding code in a web page. On that last point – WordPress now has code to embed your slideshow in a blog post.
I tested the service using these slides from a talk that I gave to my school last year, on genomic analysis of cold-adapted microorganisms. You can follow that link or see an embedded version, below.
Slideshare presentations tagged “bioinformatics” are here.