I want an all-in-one communicator!

Here's a list of ways in which I currently communicate with others:

• corporate e-mailing through outlook
• corporate e-mailing through a web client
• private e-mailing using my ISP provider's services
  
• mixed private & professional e-mailing using GMail
• chatting using mainly GTalk
• group chats through chatterous (which isn't really useful for large groups)
• publishing blog items on an internal blog (rarely)
  
• publishing blog items on a public corporate blog (about once a week)
  
• publishing blog items on my public personal blog (which you are reading right now)
• leaving comments on blog posts
  
• posting updates & replying to updates from friends on Twitter
• sending direct messages on Twitter
  
• phone calls over VoIP using my ISP provider's services (fairly frequently)
  
• phone calls over VoIP using Skype (very rarely)
• phone calls using a land line
• phone calls using a cell phone
• sending short messages using my cell phone (very rarely)
• sharing documents on Google Documents
  

I could probably find a few more if I took more time, but I think this already suffices to make my point. To support all this communication I need various tools:

• an e-mail client
• a web browser
• a Twitter interface (a web client or desktop client)
• RSS reader
  
• a cell phone
• a chat client
• a VoIP capable phone

I probably use a web browser for most of my communications, but I use various online applications for this, which in my opinion adds to the list of tools I need:

• the URL of the admin interface of my personal blog
• the URL of the admin interface of the corporate blog
• the URL of Twitter
• the URLs of the various webmail interfaces I use
• ...

In spite of the title of this post, I am not looking for an all-in-one tool for ALL my communications, but a mashup of some sorts would be really usefull.

I am thinking of a single tool that provides me with the following services:

• notify me when someone writes about a topic that interests me
• notify me about comments I receive on a blog post (for all blogs I publish to)
• notify me about updates to documents I share with others
• notify me about e-mails that really interest me (for example because of their contents and because they are sent to me by people in my network)
  
• notify me about my friend's whereabouts and activities (twitter)
• allow me to contact people using various methods depending on my relationship with these people (e.g. twitter reply, leaving a comment, send a direct e-mail, chat, call, ...)

Wouldn't it be great to have all that combined in a single, easy to use tool? If it exists, please tell me where it is. Otherwise I am calling out to the open source community to go create one.