The projects I currently work on or plan for or think about.

• • 
  • SwipSwap
  • Value proposition: Easy group contact-swap.
  • Use case: A meeting of ten people, "one button" swaps everyone's electronic business cards
  • Length of involvement: Dec 2009 - ongoing (5 months)
  • Unique aspects: BonJour neighbor discovery
  • Business Model: mobile app market sales
• • 
  • Taplister
  • Value proposition: Building community around local bars and the beers they serve.
  • Use case: Find which bars are serving your favorite, hard-to-find beer
  • Length of involvement: Dec 2009 - ongoing (5 months)
  • Unique aspects: wiki-like editing of a bar's tap list
  • Business Model: targeted banner ads, mobile app market sales
• • 
  • Jyte
  • Value proposition: Collect community opinion and add reputation to an OpenID
  • Use case: Poll the Internet with "Are red M-n-Ms better than yellow?". Give "candy" cred to users who leave interesting comments.
  • Length of involvement: Feb 2010 - April 2010 (3 months)
  • Unique aspects: OpenID centered in 2007. Very usable voting mechanism
  • Business Model: unknown
• • 
  • Geomena
  • Value proposition: Automatic geo-positioning
  • Use case: Using only wifi, where on earth am I?
  • Length of involvement: Aug 2009 - ongoing (9 months)
  • Unique aspects: Wiki-editable, couchdb
  • Business Model: For-profit spinoff with extra analysis for more accurate positioning
• • XFN Spider (currently broken)
  • Value proposition: Build a social graph
  • Use case: Study individual pdx tech members / group analysis
  • Active months: March 2009, May 2009, Jan 2010
  • Unique aspects: graph storage
  • Business Model: none
• • 
  • IceCondor
  • Value proposition: Continuous location tracking
  • Use case: My friend is 10 minutes late, are they parking or still at home?
  • Length of involvement: Sep 2008 - April 2010 (19 months)
  • Unique aspects: android client
  • Business Model: monthly subscription
• • EveryoneDelivers
  • Value proposition: Crowd-sourced delivery
  • Use case: I need this package delivered to work for $5
  • Length of involvement: Mar 2009 - Dec 2009 (10 months)
  • Unique aspects: crowdsourced replacement of traditional business
  • Business Model: per-delivery fee for the lister
• • DailyWireless.org
  • Value proposition: Wireless industry news
  • Use case: Whats going on in the wireless telecomm industry?
  • Length of involvement: Mar 2002 - ongoing (8 years)
  • Unique aspects: Sam Churchill
  • Business Model: direct-sales banner ads

Many other project ideas are on the ProjectIdeas wiki page.