I do believe this thread does not belong to this part of the area on the forum. First off, it has nothing to do with nokia and its own ranges of devices let alone it is an accessory that can be attached/connected to maemo in some way.

Just because it can run debian and/or android does not necessarily mean that it is a maemo device but rather an old maemo competitor.

If you look at the specs of the HTC Universal on the wikipedia you would have noticed that by comparing with N900. There still are far more lacking features that N900 has which your HTC Universal does not have.read here. Note: gsmarena website does not keep an up-to-date information about what N900 could still be capable of, e.g. no FM transmitter when N900 does have one and that N900 can support SDXC 64GB memory (with latest updates).

Besides, I'm sure your HTC Universal does not even offer more direct access to some of its underlying hardware components when compared to N900. Most of which may still be proprietary (not even using debian for example can unlock it). For instance:
- Is the wireless chipset natively supported under linux and that you can use latest mac80211 framework on it?
- What about direct access to DSP components so that you can for example tune the onboard camera to get the best effects? or even say for example overclocking it so that you can watch 720P?

Oh wait, I hear its 2005, specifically Q3 2005. The only comparable device from maemo range would have been nokia 770 internet tablet. Even at that the 770 supports 802.11 b/g mode (as opposed to strictly 802.11b), it has USB hostmode (non-powered, and as opposed to only user mode), it has the same amount of internal RAM and flash memory sized restrictions (not talking about extended storage such as SD/MMC). Sure the 770 lacks phone capabilities, it still is superior in other ways compared to HTC Universal which were released months later and most of all the entire maemo series never ran on android nor windows mobile by default.