This worked for me:

https://bamboo.yourcompany.com/browse/{PROJECTKEY}-{PLANKEY}/latest/artifact/shared/{ArtifactNameInBamboo}/

This still works as of Bamboo 6.3, the exact format depends if the artifact is set to shared or not. 

Normal format:

https://bamboo.company.com/artifact/PLANKEY/JOBKEY/build-latest/PLAN/artifactfilename

Shared artifact:

https://bamboo.company.com/artifact/PLANKEY/shared/build-latest/PLAN/artifactfilename

this doesn't seem to work anymore

In Bamboo 5.7.2 this url format worked for me:

http://<bamboo>/artifact/<plan-key>/shared/build-latestSuccessful/<artifact-path>

e.g. http://bamboo/artifact/ASC-CORE/shared/build-latestSuccessful/IntegrationTest/Artifacts/IntegrationTest/Doc/index.html

An easy way to generate that url is go to the build artifact page, and view an artifact. Then in the url replace build-123 with build-latest or build-latestSuccessful.

Hi donnib,

This worked for me:
http://<bambooServer:port>/browse/<projectKey>-<planKey>/latest/artifact/<jobKey>/<artifactName>/<generatedArtifactName>

<artifactName>: The name that i've set in artifact definitions page. For example: [ZIP]
<generatedArtifactName>:The real artifact name. For example: [myArtifact.zip]

And in this way:

http://<bambooServer:port>/browse/<projectKey>-<planKey>/latest/artifact/<jobKey>/ZIP/myArtifact.zip

I hope this can be useful for you

Regards,
Antonio

@Mark I cannot get http://bamboo/browse/<plankey>/latestSuccessful/artifact/<jobKey>/<artifactname> to work, i don't see this feature documented anywhere besides here :

I tried http://appbamboo/browse/ENV-ENVDBUILD/latestSuccessful/artifact/JOB1

where ENV is the projectkey, ENVDBUILD is the plankey and JOB1 is the jobkey

What could be the problem ? What i want to get is latest successful (job not plan) JOB artifact.

You can access the artifacts for a specific Job using

http://bamboo/browse/<plankey>/latestSuccessful/artifact/<jobKey>/<artifactname>

+1 This feature would be very nice when trying to automatically download the latest (successful) build

Shannon: Maybe I didn't understand your problem correctly, but I was able to link to a html file in a test reports artifact which is not at the top level:
http://bamboo.ci.codehaus.org/download/APPINFO-MASTER/artifacts/build-latest/Test-reports/html/index.html

The latest link seems to work ok for single artifacts (ignoring the requirement to link to successful builds). But for something like javadocs, the redirection doesn't work when you deep link to a file not at the top level.