This is probably not what you were asking but it may help.
I use lastpass and it works well. I wish it would incorporate into Dolphin HD but you can use its browser in a pinch. I am hoping they add this ability.
At the minimum you can copy and past from it into your web browser, that is what I do now.
The main reason I like it though is it as it syncs to their servers which keeps it in sync with the desktop so everything is the same no matter where I use it. I have several desktops and laptops I use regularly so I always use tools that stay synced so no matter what system I am on everything stays the same. That is vital to me as I can add a new site on my desktop and then access it from my Evo.
It does cost $1/month to use the mobile version, worth it to me.
Appbrain:
LastPass for Premium Customers - Android app on AppBrain
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