I'm using one that looks the same, but is made by Hawking Technologies. I have a Casio E-115 and the CF network adapter works great.
This will work on ANY PocketPC with a Type I Compact Flash port.
There is also a 100Mbps adapter if you transfer alot, but I doubt you need more that 10Mbps, and this is a good price. I bought mine from Buy.com for about $60 last year, but retail was $120 (that was what I expected).
This adapter is ideal for developing software on the PocketPC or if you transfer alot of files back and forth (hey, how many files can you transfer into 32MB...).
If you have an iPaq, you obviously need the CF expansion sleeve.
akina-
The Jornada PocketPC has a Type I CF slot, it will work fine.