Yeah, the USBUIRT is large, and that device can blast across a whole room, but I have mine tucked in the back of the media centre as it has 2 external output plugs too.
I just plugged in mono 3.5m - IR lens which i had from an old wireless video sender, so they are only 10mm long x 5mm, so overly large. They are also IR transparent, so don't get in the way of normal remote use.
Plus, due to it's 2 outputs, you can send the IR commands independently to diff stb's
With the usbuirt, you do need your own program to control the blaster.
"Shut up brain, or I'll stab you with a Q-Tip!"
--= Win7, C2D 2.93 GHz, ASUS 9400GT Silent, 2GB Ram, Few HDD's, 3TB unRAID server, Samsung 50" 1080p Plasma via HDMI, 40" 1080i LCD via VGA =-- * PVR2000 Analog PCI / Avermedia DVB-S PCI / Hauppauge 2200 DVB/Analog * PCH GBPVR Client * *BD-E6500 w/ NPVR client*