I figured I'd just use whatever software comes with the card, although if I can get it to work with TVLobby (I have a question posted there as well), that would be ideal.
I'm currently a Dish subscriber and their HiDef DVR is not included in any packages and has to b e purchased separately for around $1000. Since having the DVR on our current Dish tuner (521) my wife could not live without it (highest WAF of any gadget in the house - leaves everything else in the dust). And furthermore, Dish doesn't offer the local channels in HiDef, so OTA is the only way to get them (the 921, Dish's HiDef DVR has a built in HiDef tuner for OTA broadcasts).
Wal-Mart has a HD STB Tuner for $199, but I can't record to it - low WAF, so it's a no-go.
Using a PC-based HD PVR seems like the most economical choice, and it adds a 3rd digital recording source to the setup (the Dish 521 DVR we have now can watch/record any combo of 2 different channels). I should be able to get the card and a big honkin' HDD for around $300.
I'm also hoping, given that the tuner/PVR will be used intermittently, my HS Server that is already running HS, MLServer and JR MediaCenter can handle the additional work of running the tuner/PVR (I think the MyHD does all the encoding/decoding via hardware).
My PC is an AMD Athlon XP 2700+ on an Abit NF7-S mobo with 512MB RAM.