One of the changes coming to you in PostGIS 2.2 are additional extensions. Two ones close to my heart are the address_standardizer (which was a separate project before, but folded into PostGIS in upcoming 2.2) and the SFCGAL extension for doing very advanced 3D stuff (was just an sql script in older versions, but made an extension in 2.2 and new functions added). We had a need to have address standardizer running on our Ubuntu box,
but since PostGIS 2.2 isn't released yet, you can't get it without some compiling. Luckily the steps are fairly trivial if you are already running PostGIS 2.1.
In this article, I'll walk thru just building and installing the address_standardizer extension from the PostGIS 2.2 code base. Though I'm doing this on Ubuntu,
the instructions are pretty much the same on any Linux, just replacing with your Linux package manager.
As stated in last article, I've packaged FDW binaries for PostgreSQL 9.3 windows 32-bit and 64-bit and added in the ogr_fdw one. These we've tested with the standard EDB Vc++ built PostgreSQL windows installs and work fine with those.
This package is an updated list from ones we've distributed before that includes ogr_fdw and recompiled with latests source from www_fdw and file_textarray