I'm trying out Flickr, a photo-sharing service that's getting increasingly popular. Plenty of not-really-useful features (captions and that sort of thing), but what I'm really interested in is the ability to tag photos, search for and identify photos using tags (yours and others'), and create an community that makes it easy to share images with others.
What's also interesting about Flickr is the integration with your blogging application. This photo and the paragraph above were posted directly from within Flickr--I had to configure my Flickr account so that it could access my TypePad account, but I didn't have to use TypePad at all. (If I were slicker with HTML/CSS, I could do a lot more with the photo and text format, but I'll leave that for another day.) Another upside is that the photo's hosted at Flickr, so it doesn't count against my TypePad storage limit. (With a free Flickr account, you can upload a total of 10 MB a month, and you have unlimited storage capacity.) A downside is that I don't think I can select a category for the blog entry--I had to categorize this entry while writing this paragraph from within TypePad, but there may be a workaround.