The Philips TU1236D NIM uses: - a Philips tuner (don't know IC model) - ATI Nxt2003 demodulator The TUV1236D/U NIM uses: - a Philips tuner (don't know IC model) - adds a Philips analog demodulator (don't know IC model) - ATI Nxt2004 demodulator See http://www.ati.com/companyinfo/press/2003/4596.html for details. The HDTV Wonder definitely uses the TUV1236D/U. Note that this NIM is also employed by: - the MIT MyHD MDP-130 - the Fujiplus FD-3250 ... (which, given its based on the Bt878A decoder/pci bridge, should be a relatively easy card to add support for once the TUV1236D/U is resolved) Earlier versions of the Philips 1236 family (which Philips refers to as its 1200 series ... see their RF Solutions product sheets to see what I mean) I am pretty sure did once use the Nxt2000 and Nxt2002. For example, I'm believe that MIT's MDP-100 and iTech's AccessOne both used a Philips NIM containing the Nxt2000. The NIM used on the later MIT MDP-120 I believe contains the Nxt2002.