UUID vs serial and currval('sequence_id')

Hi,

When doing an insert with a serial primary key we can refer to
currval('sequence_name') in subsequent inserts and we also return it for
later processing.

Example:
CREATE TABLE contact (
contactid serial not null primary key, -- creates sequence
'contact_contactid_seq'
firstname text not null,
lastname text
);
CREATE TABLE contactinterests(
contactid int not null references contact(contactid),
interest text
);

-- insert statement as single transaction
INSERT INTO contact(
firstname, lastname)
VALUES('John', 'Smith');
INSERT INTO contactinterests(
contactid, interest)
VALUES (currval('contact_contactid_seq'),'Fishing');

--insert statement as single transaction returning contactid
INSERT INTO contact(
firstname, lastname)
VALUES('John', 'Smith');
INSERT INTO contactinterests(
contactid, interest)
VALUES (currval('contact_contactid_seq'),'Fishing')
returning currval('contact_contactid_seq');

Which is very nice as it gives us back the contactid.

Is it possible to get similar functionality using gen_random_uuid() or
uuid-ossp?

Thanks
Robert