No "gcc" could be found on packages.ubuntu.com

I've tried to figure out what GCC versions are available in various versions of Ubuntu, opened page packages.ubuntu.com, entered 'gcc' in the search string, chosen 'all' in "Distribution", and got the following:

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You have searched for packages that names contain gcc in all suites, all sections, and all architectures. Found 2 matching packages.
Package gccxml

    quantal (devel): XML output extension to GCC
    0.9.0+cvs20120420-3: amd64 i386

Package libgccxml-dev

    quantal (libdevel): Libraries for building extension to gccxml output
    0.9.0+cvs20120420-3: amd64 i386
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Where all gcc gone? Or is it an issue of the search system on packages.ubuntu.com?

PS: I have Ubuntu 11.04 "Natty" installed, and I have gcc-4.4 and gcc-4.5 installed, so packages.ubuntu.com should give at least these package names in search results for sure.

PPS: What are plans about packaging of gcc-4.6 and gcc-4.7?

--
WBR,
Alexander