Two friends of mine Tessie Ting and Jean Davis from Conversition in the US are making quite a splash with their new product TweetFeel which gives real-time sentiment results for Twitter.
Conversition are working with Twitter to set band widths as apparently they are getting so much traffic to the site.
I think its important to recognise that there is not one social media monitoring product that will be the panacea for the industry. We need to find a range of tools that does the best job on each platform that complement each other. Nice work Tessie and Jean!