Two great services that I am a big fan of are Cocomment and Rojo. Cocomments is a way to keep track of comments that you leave on blogs and review them at a later date. By clicking on a shortcut in your browser before you post, your comment is tracked along with any subsequent conversations you may have. Now out of beta and freely available for sign up, the service works well and will become more common place the as more people find out about this valuable service. For convenience sakes I have added the JavaScript provided to my theme, in theory eliminating the need for the browser button when posting comments on my site. Somebody want to try this out?
Rojo is far and away my favourite RSS reader, like a Del.icio.us (see my How To) for RSS, the network is growing fast and the site has just had a slick redesign. One of the features they have just added is the Feedshare feature, a dynamic link share on your blog, intended to increase your circulation of your RSS feed on sites with similar subject matters. I have added this along the sidebar and intend to blog on the success of this feature in a couple of months. (Though its safe to assume if it disappears its likely that it wont have been a raging success!)
[...] I have blogged briefly about Cocomment before, the excellent comment and conversation tracking service. As a way to track those blog conversations that develop from time to time this genius and if you haven’t signed up you should. With more and more blogging solutions being integrated into this service (now including Flickr and Digg), it has and will continue to become for many, an essential tool. With the majority of comments coming from bloggers is it not already now a major disadvantage for you blog not to be compatible? [...]