JoikuSpot is pretty handy - lets you set effectively turn your phone into a wireless router for your HSDPA connection. Supports encryption and there is a free version.
Oh yeah, also Shozu which I know you already use and Opera Mobile, which I have just installed and not really used yet so can't render an opinion there
* Google Maps. * The Core Pocket Media Player - to play media with. * Opera Mobile, for when I get annoyed with "Internet Explorer". * LiveJournal Mobile, for posting to LJ.
CoPilot Live 6 - came as a freebie with the phone. Route finding and place finding are okay but I normally know where I'm going to anyway so I use it primarily as a HUD so I'm forewarned about the road ahead. If I were buying sat-nav I'd probably go for Tom-Tom instead. Opera mini
Google Maps - doesn't really need explanation :)
FEexplorer - decent file manager
Metr0 - Metro routefinder for a whole host of major cities (handy for me since I spend enough time in London to rack up a lot of tube time.
Putty might come in handy with that keyboard ;)
Cocktail - db of carious cocktails, will highlight ones makable if you provide a list of your available ingredients
Calcium - better calc app
Emtube - youtube app
Google Search client - for the active standby screen (http://www.google.com/mobile/)
Theres a bunch of stuff referenced here.
Now I realise this post violates all the terms of your query, but it got me thinking and these ones caught my eye :)
* Google Maps.
* The Core Pocket Media Player - to play media with.
* Opera Mobile, for when I get annoyed with "Internet Explorer".
* LiveJournal Mobile, for posting to LJ.
Google Mail app
Opera Mini app
Opera mini