I'm a fan of numbers and every year when I return from the annual Esri User Conference something that always jumps out at me as very interesting are the numbers.

So, in pouring over my notes, here's just a sampling of some interesting numbers... enjoy! Got a number to share with me? Ping me on Twitter @gletham

ESRIUC numbers of interest ...

Free - Maplex is to be included with your ArcGIS license at 10.1

Free - ArcGIS Online is free and open to all

Free - The ArcGIS mobile app is free to all as are the mobile SDKs, however, if your mobile app is deployed for a charge a fee split must be arranged with Esri.

Q1 - ArcGIS 10.1 is expected to ship to customers Q1 in 2012

3 - This year an informal gathering of Geo Tweeps met up for the 3rd annual esriuc TweetUp - between 40 and 50 folks showed up this year

3D - ArcGIS 10.1 boasts enhanced 3D analysis, thematic mapping, and even 3D routing.

4 - 4 x 4 pixels is the area required to be supported by mobile apps developed to run on ArcGIS for iOS

4 - The ITT VIS partnership with esri goes back 4 years, to a meeting with Jack D. about imagery, and the vision and integration of the tools and solutions. Today, ENVI technology and functionality is now built into ArcGIS.

10 - ArcGIS iPhone app is supported by 10 languages

10.1 - ArcGIS 10.1 is the next version of the company's suite planned for release. the 10.1 Beta will be open to all customers and should kick off by the end of July 2011.

12 - ArcGIS for iOS kicked off as the #12 productivity app in the iTunes store in 2010

16 - The way cool and popular GeoGeek T-shirt cost me just $16 in the esriuc Spatial Outlet store!

25 - Clint Brown of Esri recall his first ESRIUC in 1983 where there were about 25 people in attendance.

64 - ArcGIS Server in the next full release will be a 64 bit architechture only - so long 32 bit support.

70 - number of hours I estimated I was n my feet at the esriuc and related events through Thursday!

99 - The annual fee for developers to join the Apple iTunes developer program (ie. to publish your own apps running on ArcGIS mobile using the iOS SDK)

100 - Getting your photo snapped with Jack Dangermond was worth 100 points towards the photo safari competition in the DTS Agile esriuc backchannel competition.

140 - more than 140 Special Achievenet in GIS (SAG) awards were presented at the user conference http://events.esri.com/uc/2011/sag/list/

313 - Jesse and Sue, the Very Spatial team, posted podcast episode #313 from the esriuc

440 - There's over 440 photos available for viewing in this esriuc Flickr Set captured by @gletham

450 - On Wednesday, the busiest day of the week, there were more than 450 events/sessions/activities to select from according to the uc backchannel mobile agenda.

687 - Epilogger shows that there were 687 photos uploaded to Yfrog and TwitPic with the esriuc hashtag

2,000 - at R 1.1 ArcGIS will support in excess of 2,000 coordinate systems

10,858 - At the time of writing @esri had 10,858 followers

11,797 - Using the awesome Epilogger service I found that they pull 11,797 tweets in their analysis of the #esriuc hashtag

15,000 - the number of attendees at this year's record setting event - see this fab attendee map from esri

31,000 - there were 31,000 downloads of the first ArcGIS iPhone app lin the first week of release after the 2010 esriuc

190,000 - There has been over 190,000 downloads of ArcGIS iOS to date

Millions - Millions of people now use onkline map services every day (ArcGIS online, Google maps, Bing, Mapquest)