Presenting day 4 of my favorite tweets from the ESRI Business Partners Conference / Developer Summit. A lot more tweets coming through today with the #devsummit hash tag than there were the first two days with the #esri_bpc hash tag. My unscientific conclusion is that developers use Twitter more than business types.

• @trbaker Where are your #Twitter followers? GeoTweeters: http://bit.ly/lscto #devsummit #gis #socialnetworking - via @geoinformacao
• Sweet! We wom the mashup challenge! Plus big shout out to @dbouwman from #esri #devsummit - via @bnoyle
• #ESRI #mashup challenge winners now online at http://bit.ly/5jG8Dz #DevSummit #esridevsummit - via @giseducation
• Recently "mashup," now "cloud." Keywords we get to listen to for a while. #devsummit - via @RealIdahoBoy
• David Chappell: "Startups love cloud platforms. They allow startups to fail fast and cheaply (or even free)." #devsummit - via @ChrisSpagnuolo
• Hopefully Chappell will show how expensive windows azure is. #devsummit - via @cageyjames
• #esri story on cloud computing is good, but still need more info on cost/time to scale and a move away from ELA only needed #devsummit - via @bnoyle
• Spatial data stored in user tables, can be accessed via SQL #devsummit - via @TrippingTheBits
• It is odd to me tho that complex maps perform better using SHP in AGS. #devsummit - via @kirrilian
• The Flex editor is nice, but worry some will forget to use tools in the context of a workflow. Don't re-create ArcEditor in Flex! #DevSummit - via @dbouwman
• New to ArcGIS 10: Query Layers = layers based on real SQL queries! #devsummit - via @TrippingTheBits
• Sounds like FGDB API is still a ways off #devsummit - via @cageyjames
• No support for Annotation, Relationships, Networks, Topologies, Representations, Terrains and Parcel Fabrics in FGDB API #devsummit - via @cageyjames
• Sweet. Ed architecting a SQL compatible geocode soln. Off the cuff in response to question #devsummit - via @bnoyle
• Browser usage in demos: Firefox = most, Chrome = a couple, IE = NONE. #devsummit - via @gadtweet
• REST extension URLs: /serverUrl/exts/extName/extMethod #devsummit - via @TrippingTheBits
• Woah, add AGS Inet connection to ArcMap, right-click, choose Edit Features, makes local copy, sync back to db #devsummit - via @TrippingTheBits
• #devsummit ver 2 of esri #silverlight API built on #VS2010 and #SL4. New widgets for editing,time,and feature data editing in toolkit. - via @cfemmer
• #devsummit @SharpGIS is spreading the #SL goodness. woot for binding and commanding! - via @jrockers
• Playing with ArcGIS Explorer sdk...pretty awesome! A lot more control than I expected! #devsummit - via @NateStrout
• iPhone SDK for AGS Server interesting. If only I had a Mac for development.... #devsummit - via @northpointgis
• MS Surface demo, picking AGOL sources and dropping onto a map is slick! #DevSummit - via @geeknixta
• #devsummit Iphone SDK will work with iPad and iTouch too. SDK assumes always on connection. - via @jshek

For newcomers to the series, here are my day 1, day 2 and day 3 favorites.

Enjoy!