The Teradici Management Console is free, you just download the virtual machine files from their site and import it onto a VMware host. The management of it is all web based.
The Wyse P25s most definately have a web configuration component built into the firmware. All Teradici zero clients do. In fact, other than the housing and some port differences, all of the Teradici chipset based zero clients are identical (HP t310, EVGA PD06, Wyse P25, etc). I buy them on price mostly, as they are pretty much interchangable and can all be managed using the same management console since it's all the same Teradici internal parts (the manufacturers don't really tell you that part).
If I have some time tomorrow, maybe I'll upload some screen shots.