On Twitter at twitter.com/BoostYourBIM
Here is some recent posts that I found to be pretty interesting:
Macros vs. Add-Ins – What’s the difference?
The code for your macro is stored in an RVT file if it is a document macro. If you create an application macro the code is stored independently on your computer ... The code for your Add-In gets compiled into a DLL file.
Revit API Wiki and RevitAPI.chm
Revit API Developer’s Guide Wiki at http://wikihelp.autodesk.com/index.php?title=Revit/enu/2013/Help/00006-API_Developer%27s_Guide.
Scrubbing Out Dimension Styles
Harry provides a deleting / purging macro that handles both dimensions in sketches and dimensions in unplaced groups.
Save a Set of Elements with SelectionFilterElement
Although full Revit 2013 (Onebox) has built-in Saved Selections, you can see how little code is required to actually make basic selection filters on this post.
I previously posted about a free add-in for single selections, and there is also Case Apps Reusable and Sharable Selection Sets...
Making Lines Not Print (with Events)
I can't say I've ever wanted this ... but it basically switches a certain line style to white before printing, then back afterwards...
Some info about Harry (from BIMopedia):
Harry joined Revit Technology Corp in 1998 and spent his last few years at Autodesk as a software developer on the Revit API team. Now Harry has set out on this own and would like to help more people appreciate and benefit from the Revit API.