Some of the recent upgrades you can plainly see, such as the wrought-iron fencing mentioned below and the colored lighting outside the venue. (The venue has installed 24 LEDs and has gained control of the street lanterns in front of the Fillmore, and those will all be colored within the next few weeks with low-level LEDs.) Others, meanwhile, are less obvious but no less noteworthy, such as modifications to the roof (the entire roof has received new insulation) and the swamp-cooler system. While you can't necessarily see those changes, you may notice them in the climate control of the venue.
According to Pirritt, there's a number of other enhancements in store in the coming months and year, including installing all new windows at the venue and setting up another entrance into the venue at the rear of the building to allow fans to gain quicker access to shows, all of which are aimed at bolstering the overall concert-going experience.
Original item (10/7/11): Ah, so that's what those brick columns were for in front of the Fillmore. We were wondering. In case you missed it, the Fillmore has installed a new wrought-iron fence in front of the venue, where the smokers congregate during shows. Needless to say, it's an impressive upgrade from the unsightly chain-link fencing that previously separated the nicotine-indulgers from Colfax.