Apt-get source question

[Paulo Henrique Baptista de Oliveira <baptista@cos.ufrj.br>]

        Hi Debian users,
        anyone knows if with apt-get source package I can see the new avaliable packages before get sourcing to checks if the pack
age is it or doesn't exist?
        My problem is:
        I have a slink home box. First I installed apt 0.3.11 to get source potato packages to compile here. So, I have a slink bo
x with lot of potato packages compiled.
        But, how do I check what new packages are avaliable for me to get with apt-get source? Only with more /var/lib/dpkg/avalia
ble I can do this! :(
        Thanks,         Paulo Henrique