I have been in IBM for almost 3 years, and have managed to subscribe to a fair number of the external blogs by IBMers over the last couple of years. So, here is the list (unfortunately without all the names):

• [RSS] Arseneault.ca
• [RSS] Axel’s Travelog
• [RSS] Connected (ex-IBM)
• [RSS] Digital(Analog)
• [RSS] Elias Torres
• [RSS] ELSUA ~ A KM Blog by Luis Suarez
• [RSS] epredator’s blog – The real life of a metaverse evangelist
• [RSS] Irving Wladawsky-Berger
• [RSS] Jen O – A Room of My Own
• [RSS] joga blog
• [RSS] Ktn
• [RSS] Mx plan :: sachachua’s blog
• [RSS] Notes from a small field
• [RSS] Project Junction
• [RSS] Read This Blog!
• [RSS] Roo Reynolds
• [RSS] smackman
• [RSS] snellspace.com
• [RSS] Social Networking with Software
• [RSS] The adventures of Coccobill
• [RSS] The bamboo raft
• [RSS] The lost outpost
• [RSS] The RTP Scrolls
• [RSS] ThoughtShoppe (ex-IBM)
• [RSS] Triangulating the trifecta
• [RSS] Virtueality ~ Pranab
• [RSS] Zorts Lives

Incidentally, if you are wondering how I created the above list, it was using an OPML to HTML converter on a trimmed OPML file exported from Google Reader, that I found through a Lifehacker article.

There is also the comprehensive list of blogs by IBMers on the IBM internet site, but it is missing a few entries present on my list.