You can have a geonotice on selected projects if you so wish. This has been the standard way to publicize an event in the past 2 years or so.

On Aug 26, 2011 3:09 PM, "Lewis Cawte" <lewiscawte@googlemail.com> wrote:
> On 26/08/11 02:12, Thomas Morton wrote:
>> Lewis, I am still definitely interested.
>>
>> Perhaps it is a good time now to get a firm list of possible attendees?
>>
>> I mean; so far it seems to be me and Richard who are interested in
>> attending. If it is only three of us, hell, I am still up for it :)
>> but maybe drumming up more firm interest would be good?
>>
>> Is there a way to drum up wider interest on-wiki?
>>
>> Tom
>>
>> On 25 August 2011 20:58, Lewis Cawte <lewiscawte@googlemail.com
>> <mailto:lewiscawte@googlemail.com>> wrote:
>>
>> I've decided (due to various factors) that I'm going to move it
>> back a weekend, it will now be on the 19th/20th of November. Still
>> confirming a venue, maybe looking at a group booking at
>> Travellodge ...
>>
>> Can't think of what else I was going to mention but feel free to
>> question me. :)
>>
>> -- Lewis Cawte
>>
>>
>> On 22/08/11 10:50, WereSpielChequers wrote:
>>> Well I thought I made a decent case for avoiding a clash.....
>>> People can't attend both and for most people the London meetup
>>> will be closer.
>>>
>>> WSC
>>>
>>> On 22 August 2011 05:57, Lewis Cawte <lewiscawte@googlemail.com
>>> <mailto:lewiscawte@googlemail.com>> wrote:
>>>
>>> On 20/08/11 09:00, Gordon Joly wrote:
>>> > On 20/08/2011 01:01, WereSpielChequers wrote:
>>> >> As Brighton is rather close to London can I suggest that
>>> we try and
>>> >> avoid having this clash with the London meetup? That still
>>> leaves you
>>> >> the 1st, 3rd and 4th weekends of the month.
>>> >>
>>> > I tend to disagree. Make the choice without reference to
>>> the London
>>> > Wikimeet.
>>> >
>>> > Gordo
>>> If anyone gives me a decent case on why I should move it, I
>>> will, but at
>>> the moment, I'm staying put, just because thats already what
>>> people have
>>> seen or been told that it will probably be...
>>>
>>> -- Lewis Cawte
>>>
>>> _______________________________________________
>>> Wikimedia UK mailing list
>>> wikimediauk-l@wikimedia.org <mailto:wikimediauk-l@wikimedia.org>
>>> http://mail.wikimedia.org/mailman/listinfo/wikimediauk-l
>>>
>>
>>
>> _______________________________________________
>> Wikimedia UK mailing list
>> wikimediauk-l@wikimedia.org <mailto:wikimediauk-l@wikimedia.org>
>> http://mail.wikimedia.org/mailman/listinfo/wikimediauk-l
>> WMUK: http://uk.wikimedia.org
>>
>>
>>
>> _______________________________________________
>> Wikimedia UK mailing list
>> wikimediauk-l@wikimedia.org
>> http://mail.wikimedia.org/mailman/listinfo/wikimediauk-l
>> WMUK: http://uk.wikimedia.org
> Good question, I know I have a WMF staff member/contractor who said he'd
> come (Catrope - Dutch Citizen) and 'sumanah' has been drumming up some
> interest on IRC... I'll see about listing it on Meta events, maybe
> that'll show some up, but I was told chapter folk know the best way to
> advertise this on wiki :)
>
> -- Lewis Cawte
>
> PS: The wiki page for this is located at
> http://www.mediawiki.org/wiki/Brighton_Hackathon_2011 - however
> registration via another form will be required if anyone is after the
> group booking (I need atleast 10 rooms booked for that?) and to speed up
> stuff on the day.