Bluetooth Headset WILL NOT WORK. It's a linux device with Out of Date drivers, you'd have to use a Wired headset. (USB handset might work? Unknown by me.)
Typing decently fast? Pretty much thumbs only, but it's faster than say a mobile phone.
Probably best setting up OZ/GPE or PDAXROM - That'll give Firefox, Thunderbird, Playstation, Snes, Gameboy etc emulators, Not sure on RSS or VOIP.
The only other device I can think to reccomend is the Dell Axim x51, which is more powerful, with inbuilt Bluetooth and Wifi along with SDIO/CF. Not sure what third party software for it is like since there is no Linux port, and it runs Windows Mobile 5. That could be used with a Bluetooth headset and keyboard though.
Another thing to consider is the C1000. It's basically the same, but no internal Hard disk. If you're brave you can install internal Wifi and Bluetooth, Altthough it involves a soldering iron. You can still plug it into an External (POWERED) USB hard disk enclosure though, Which will give you between 20gb and 300+gb, although at a miserable 12Megabits per second. (Less if using the wifi and bluetooth at the same time.)
That has the same keyboard as the 3200, and is slightly cheaper.
Finally, You can try the Tosa (SL-6000) which comes in 3 flavours: he N, with no wireless, L, with Wifi 802.11B only, or the rare "W" with both internal Wifi and Bluetooth. It also has the USB port, and a Compact Flash slot. I believe there is even an optional expansion jacket that can be used to add a second CF and second Battery.
I don't know if this model is still for sale, or where to get it.
For the 1000/3200 PRICEJAPAAAAAN!