This is a generic problem. There are many "temporary project" or "fixed life" wikis (not necessarily a bad thing, they provide focus). There will be more in future. Hence cross-posting this thought here.
 
Maybe a subdomain "archive.wikimedia.org" could be set  up, with old closed wikis marked as non-editable and moved to subdomains of this, and an index of archived wikis available on the front index page? So when it's no longer in use, "ten" would end up at "ten.archive.wikimedia.org" (with the old domain redirected) and be readily located by anyone interested future.
 
FT2
 

On Tue, Mar 22, 2011 at 10:05 AM, Ted Chien <hsiangtai.chien@gmail.com> wrote:

We also haven't received the merchandise for Wikimedia Taiwan, will it be shipped?

Regards,
Ted Chien
-- Sent from my Nexus One.
LinkedIn: http://linkedin.com/in/htchien

Support Free Knowledge:
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2011-3-22 下午4:44 於 "Lucien leGrey" <lucienlegrey@gmail.com> 寫道:

> Steven: We have not received any merchandising item yet (I'm referring to
> the Wikimedia Spain package to Compostela)... Do you receive my messages?
> (may be my address is in any spam filter :()
>
> Best regards,
>
> 2011/3/22 <fridaesdoom@gmail.com>
>
>> Speaking of which, I couldn't attend an event and I'm not sure if there was
>> anything available at the event... is there anyway I could obtain such
>> merchandise?
>>
>> On , Steven Walling <swalling@wikimedia.org> wrote:
>> > On Mon, Mar 21, 2011 at 7:12 PM, Jeremy Baron jeremy@tuxmachine.com>
>> wrote:
>> >
>> >
>> >
>> >
>> >
>> > Keep in mind there's more tenwiki events that haven't occurred yet.
>> >
>> >
>> > e.g. anniversaries for other languages.
>> >
>> >
>> > -Jeremyb
>> > Yeah, I don't think we need to do anything immediately, but we should
>> probably start planning, since there has been very little activity lately on
>> the site.
>> > --
>> >
>> >
>> >
>> >
>> > Steven WallingFellow at Wikimedia Foundation
>> > wikimediafoundation.org
>> >
>> >
>> >
>> >
>> _______________________________________________
>> WikiX-l mailing list
>> WikiX-l@lists.wikimedia.org
>> https://lists.wikimedia.org/mailman/listinfo/wikix-l
>>
>>
>
>
> --
> + Lucien
> ------------------------------------------------------------
> ¡Participa en Wikimedia España!: http://www.wikimedia.org.es/

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