I'm interested in tweaking Viewer. Especially on internationalization issues. I'm also interested in translating viewer UI and documentation (including this wiki) into Japanese.
I have a blog on open source viewer development, that is written mostly in Japanese.
Please feel free to talk to me when you see me in-world, or to send IM. I read English and Japanese.
About my works
View my notes on fontconfig. The fontconfig is now a part of the Linden's viewer (since 1.20 RC7 or so.)
I also made a list of Internationalization Issues files on JIRA (but it is almost out-of-date).
A memo on LLFont and related classes is available.
I wrote a proposal/plans on pango adaptation.
I'm now working on this. (As of Sep. 2008.) See JIRA issuefor the progress.