I seem to have started a riot of interest!
The IR devices available in the UK are diferent, but I can readily obtain a Honeywell device which is open collector with a 10K pullup, contains a schmitt trigger, and is not tuned. This is very similar to the Fairchild device. I was able to obtain mine through Radiospares. Farnell (UK) only keep the active low Fairchild device.
It may be possible to use a PIC as an interface quite easily from either USB or serial ports of a PC. Elektor published a remote code decoder in October 2001, and reprints are still available. This used a Philips micro but details of the RC codes are given in depth. Details are at:
http://www.elektor-electronics.co.uk/De ... earchText=
It costs £1 (about $1.60) to download the pdf file.
The PIC range includes several USB devices, and for personal or small production runs (I believe up to 10K) there is no charge to use Microchip's HID.
FTDI do a USB to RS232 chip which is readily available but is only for that function. It is 8051 based. There are I2C & SPI versions as well, so anyone well versed in 8051 may prefer these, or various Atmel uCs.
There is an excellent development program for Microchip PIC flash parts, (and some Atmel parts) which is free for up to 2K of code, and that is a lot for PICs.
If you play with a PIC take a look at
http://www.mikroe.com/. The devlopment software comes in three flavours: C, Pascal or Basic. The IDE includes an excellent serial port terminal HID writer and USB port reader/writer. There is also a software simulator although the current version has a problem with this, but a revision is to be released any day soon (or so they say.)
They have an excelent forum, along similar lines to this one. I have no connection with them, but have used Mikrobasic for about 2 years with good results.