When I embarked on WhaTBI? I was intending to look at ObjectSpaces "at some point", but not too urgently as they would not be around until Whidbey.

However, I definitely intend to have a good look at NEO in the very near future, not least because it's from ThoughtWorks, so is likely to encapsulate many of the same principles from Martin Fowler's book as I intended to when I (finally) got around to the O/R mapping bits of WhaTBI.

Also on my "intended reading" list are:

The observant amongst you may have noticed that these are both GDN Workspaces, which combined with NEO being a SourceForge project seems be indicative of a bit of a trend towards exploring ideas by collaborative development.

Whilst I'm on this subject it's probably also worth noting that development of RSS Bandit has moved from its GDN workspace to a new SourceForge. Dare explains his reasons for moving here (via Mike Gunderloy).