05/10:

2XMMi-DR: XMM-Newton Second Serendipitous Source Survey Incremental Data Release 3 released, now searchable through LEDAS.
10/09:

The PIMMS section has been overhauled, and should now be up to date with the new version of PIMMS and webPIMMS (3.9k)
07/09:

The LEDAS mirror of the Chandra X-ray Center has been retired.
06/09:

The LEDAS mirror of the Chandra X-ray Center will be retired at the end of July 2009.
05/09:

WebPIMMS has had more Raymond-Smith models added, this should increase the accuracy of the estimates WebPIMMS makes.
12/08:

FLIX 2XMM upper limit estimation service, now online through LEDAS.
11/08:

LEDAS has a new man in charge! Olly Butters has taken over from Duncan Law-Green as the lead LEDAS maintainer/developer. Find out more about Olly on his website.
09/08:

2XMMi: XMM-Newton Second Serendipitous Source Survey Incremental released, now searchable through LEDAS.
07/08:

NOTE: Potential issue with coordinate conversion from equatorial to galactic or ecliptic in BLASTA. Searches may give inaccurate DEC results. Thanks to Aaron Slodov (SETI Institute) for the bug report.
04/08: Presentation on LEDAS, AstroGrid and the Virtual Observatory, National Astronomy Meeting 2008 [more>]
04/08: PIMMS and WebPIMMS updated to v3.9f. Multiple updated effective area curves [more>]
04/08: Chandra data analysis software CIAO updated to version 4.02. MacOSX version 10.5 (Leopard) patch. [more>]
03/08: Chandra calibration database CALDB updated to version 3.4.3 [more>]
12/07: Chandra calibration database CALDB updated to version 3.4.2 [more>]
12/07: PIMMS and WebPIMMS updated to v3.9e. Updated effective area curves for Chandra [more>]
11/07: Chandra data analysis software CIAO updated to version 4.0beta3 [more>]
10/07: PIMMS and WebPIMMS upgraded to v3.9d. Updated effective area curves for Suzaku XIS and HXD instruments [more>]
09/07: BLASTA updated to support Sloan Digital Sky Survey Photometric Catalog Data Release 4 (DR4) [more>]
09/07: Chandra calibration database CALDB updated to version 3.4.1 [more>]
09/07: Spectral line analysis software PROFIT upgraded to version 2.0.0 [more>]
09/07: PIMMS and WebPIMMS upgraded to v3.9c. Updated XMM-Newton effective area curves for AO-7 proposers. Significant changes to EPIC/pn predicted count rates [more>]
08/07: Second XMM Serendipitous Source Survey 2XMM now available through ARNIE5 [more>]
08/07: Chandra interactive plotting software CHIPSbeta manual online [more>]
08/07: Chandra data analysis software CIAO updated to version 4.0beta2. [more>]
08/07: Updated Opacity Project files to version 3.3 [more>]
05/07: Command line/CGI-scripted access to BLASTA catalogues via WCSTools 'scat' [more]
05/07: Chandra data analysis software CIAO upgraded to version 4.0beta1. Chandra calibration database updated to version 3.4.0 [more]
01/07: Two software patches for users running CIAO under Mac OSX 10.4 (PowerPC and Intel) have been released. [more>]
01/07: Chandra data analysis software CIAO upgraded to version 3.4. Chandra calibration database updated to version 3.3.0 [more>]
01/07: PIMMS and WebPIMMS upgraded to v3.9b. Updated effective area curves for Chandra Cycle 9, bug fix for redshifted table models [more>]