Two of the plugins I use on my blog seem to have an unfortunate conflict. ShareThis is a cool plugin which provides a share bar on each post allowing viewers to share it on more than 85 social networks including Twitter and Facebook. This plugin not only provides a aesthetically pleasing share bar, it is also configurable and allows to chose between various bar layouts.
SmartYoutube also makes life a lot easier for the prolific blogger. Instead of going to youtube.com and copying the embed code in your post’s HTML view, SmartYoutube allows you to embed youtube videos merely by copying the link to the video and replacing the http with a httpv.